The Largest Patent Law Firms in Great Britain

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This report is about patent law firms in Great Britain. We analyze which patent law firms are most active in patent filing and prosecution. What are typical filing strategies and how do firms differ in terms of client structure?

First of all, it is important to explain what data we based the analysis on: It is all patent applications including granted patents since 2014. Our data set contains EP filings, national GB filings and international PCT applications handled by patent law firms located in the United Kingdom. The cases can be decided already, but can also still be in the prosecution process.

It is important to understand how we allocated the applications to the respective years. We use a mix of patent filing dates and dates of the earliest publication. Whenever an application is itself the priority filing, a direct EP or GB foreign filing or a PCT application filed by a British law firm, we refer to the application filing date. However, when an EP or GB application is a subsequent of a foreign priority and filed on the PCT route, we use the earliest publication date of such applications. This distinction is necessary because, in the raw data, PCT-based national phase applications usually receive the filing date of the underlying PCT rather than the actual filing date of the national filing. The earliest publication date is much closer to actual time a British law firm has worked on the filing. It is published a few weeks or months after the transmission to the patent offices.

For priority applications, patents information are usually published 18 months after they have been filed. Therefore, figures cannot yet be complete for 2017 and 2018 applications/grants. We have included the latest publications we have available.

		Overall	Rank	Rank	Ratio	Rank	Rank	Rank	Ratio	Ratio
Rank	Law Firm	Overall Filings	Domestic filings	Foreign Filings	Foreign Filings	PCT Filings	EP filings	GB filings	PCT/Overall	PCT/Domestic
1	DEHNS	14,229	2	1	79%	3	1	2	7%	36%
2	MARKS & CLERK	13,520	1	2	74%	1	2	1	11%	42%
3	HGF LIMITED	11,331	3	3	76%	2	3	4	10%	40%
4	MEWBURN ELLIS LLP	9,127	6	4	80%	5	4	5	8%	43%
5	D. YOUNG & CO.	8,406	4	7	72%	4	7	6	12%	43%
6	BOULT WADE TENNANT	7,565	7	8	78%	9	8	9	8%	36%
7	J.A. KEMP & CO.	7,517	12	6	82%	8	5	19	8%	45%
8	HASELTINE LAKE	7,104	11	9	79%	11	9	7	8%	40%
9	CARPMAELS & RANSFORD	6,962	25	5	91%	21	6	34	5%	53%
10	KILBURN & STRODE	6,642	13	10	80%	13	10	15	9%	44%
11	WITHERS & ROGERS	6,602	5	11	71%	9	14	3	9%	31%
12	VENNER SHIPLEY LLP	5,994	9	13	74%	15	11	14	10%	38%
13	MATHYS & SQUIRE	5,831	10	14	75%	16	13	12	9%	36%
14	GILL JENNINGS & EVERY	5,688	15	12	79%	11	12	18	10%	49%
15	REDDIE & GROSE	5,618	14	15	77%	6	15	21	13%	56%
16	BARKER BRETTELL LLP	5,139	8	16	69%	14	16	11	11%	36%
17	MURGITROYD & COMPANY	4,303	18	19	75%	7	19	23	15%	58%
18	APPLEYARD LEES	3,899	16	20	71%	19	21	10	11%	37%
19	MAUCHER JENKINS	3,801	31	18	88%	29	18	32	4%	35%
20	POTTER CLARKSON LLP	3,576	17	21	69%	17	20	24	15%	48%
21	PATENT OUTSOURCING LIMITED	3,494	83	17	96%	92	17	53	1%	26%
22	URQUHART-DYKES & LORD	2,795	20	26	63%	22	25	17	12%	33%
23	PAGE WHITE & FARRER	2,700	23	25	74%	20	24	28	15%	59%
24	ELKINGTON AND FIFE	2,573	37	23	87%	37	22	36	4%	35%
25	A.A. THORNTON & CO.	2,486	58	22	92%	35	26	13	5%	62%
26	OLSWANG LLP	2,343	38	24	87%	41	23	51	5%	34%
27	EIP	2,146	19	32	50%	18	31	29	22%	43%
28	W.P. THOMPSON & CO.	1,894	36	28	80%	27	28	41	11%	56%
29	BECK GREENER	1,819	48	27	86%	42	27	44	6%	42%
30	ABEL & IMRAY	1,791	21	35	50%	23	33	22	15%	30%
31	KELTIE LLP	1,696	26	33	62%	28	32	27	12%	31%
32	HARRISON IP LIMITED	1,552	42	29	82%	48	44	8	6%	32%
33	MILLER STURT KENYON	1,278	160	30	97%	144	29	119	1%	39%
34	MASCHIO & SOAMES LLP	1,219	137	31	95%	112	30	174	2%	44%
35	WILSON GUNN	1,047	22	51	32%	26	43	26	20%	30%
36	WILLIAMS POWELL	990	46	36	74%	55	35	43	8%	30%
37	FINNEGAN, HENDERSON, FARABOW, GARRETT & DUNNER	960	135	34	94%	106	34	166	3%	50%
38	FORRESTERS	927	28	48	41%	24	0	16	26%	43%
39	SWINDELL & PEARSON	898	30	46	48%	39	41	35	12%	23%
40	SLINGSBY PARTNERS	881	24	63	24%	30	56	25	17%	23%
41	WYNNE-JONES, LAINE & JAMES	846	27	58	29%	32	50	30	17%	25%
42	ALBRIGHT IP	740	54	42	68%	35	37	157	17%	54%
43	BAILEY WALSH & CO LLP	718	29	65	28%	33	59	33	19%	27%
44	COOLEY LLP	706	118	37	90%	67	36	138	8%	80%
45	BARON WARREN REDFERN	697	73	39	78%	78	39	69	6%	28%
46	AVIDITY IP	682	89	38	83%	62	38	104	9%	51%
47	GRAHAM WATT & CO LLP	616	99	41	84%	56	42	95	12%	79%
48	BRYERS LLP	596	32	75	25%	38	57	41	18%	25%
49	GREAVES BREWSTER LLP	583	63	47	67%	60	45	71	11%	35%
50	OPTIMUS PATENTS LIMITED	564	93	45	81%	97	54	38	6%	30%
51	HEPWORTH BROWNE	556	55	53	58%	58	46	57	13%	30%
52	PEARL COHEN ZEDEK LATZER BARATZ	547	198	40	97%	117	40	179	4%	150%
53	TLIP LTD	531	34	86	23%	25	78	47	40%	51%
54	HOFFMANN EITLE	527	158	43	93%	0	0	20	0%	0%
55	MATHISEN & MACARA LLP	522	67	50	66%	45	46	92	19%	57%
56	DOLLEYMORES	518	65	52	64%	130	52	44	4%	11%
57	SAGITTARIUS IPC LIMITED	512	44	59	48%	34	53	82	25%	49%
58	ADAMSON JONES	504	40	67	39%	44	65	48	20%	33%
59	OPENSHAW & CO.	482	188	44	96%	181	46	59	1%	33%
60	SERJEANTS	453	47	68	43%	57	58	67	16%	29%
61	IPCONSULT	451	33	159	4%	59	139	31	15%	15%
62	PHILLIPS & LEIGH	446	107	49	81%	71	49	109	11%	56%
63	SCRIPT IP LIMITED	431	52	72	43%	65	51	94	13%	23%
64	STRATAGEM IPM LIMITED	421	35	127	11%	31	92	49	35%	40%
65	NOVAGRAAF IP	408	83	54	68%	88	64	58	9%	27%
66	SECERNA LLP	407	49	74	39%	46	71	63	23%	37%
67	DUMMETT COPP	402	43	81	33%	51	75	52	20%	30%
68	IP21 LIMITED	399	39	98	23%	50	84	46	21%	28%
69	LINCOLN IP	374	53	78	37%	46	75	62	25%	39%
70	SCHLICH LLP	367	68	69	53%	54	68	80	21%	45%
71	MAGUIRE BOSS	364	82	62	63%	84	62	82	10%	28%
72	FRY HEATH & SPENCE LLP	353	76	65	57%	78	66	78	12%	28%
73	CHAPMAN+CO	351	57	81	37%	39	73	112	31%	49%
74	F.R. KELLY & CO.	348	45	102	24%	92	112	37	9%	13%
75	BASCK LTD	339	41	116	17%	51	99	54	24%	29%
76	STEVENS, HEWLETT & PERKINS	334	109	57	75%	80	61	133	12%	49%
77	F.J. CLEVELAND & COMPANY	331	141	55	84%	130	55	200	6%	38%
78	LUCAS & CO.	318	112	61	76%	92	67	97	10%	43%
79	AGILE IP LLP	306	50	114	19%	65	102	50	19%	23%
80	CHAPMAN IP	305	66	85	40%	117	116	40	8%	13%
81	NASH MATTHEWS	291	50	132	15%	49	116	56	30%	35%
82	LADAS & PARRY	286	198	56	94%	193	60	174	2%	31%
83	THE IP ASSET PARTNERSHIP LIMITED	283	64	97	34%	72	80	72	17%	25%
83	SAUNDERS & DOLLEYMORE	275	168	60	88%	134	63	229	7%	58%
85	ASTRUM-IP LIMITED	269	70	90	39%	68	88	73	21%	34%
86	YEADON IP LIMITED	258	122	70	74%	112	71	136	10%	37%
87	HANDSOME I.P. LTD.	255	61	112	24%	75	120	55	18%	23%
88	BROOKES BATCHELLOR LLP	254	123	71	74%	83	70	194	15%	58%
89	GRAHAM JONES & COMPANY	254	60	118	22%	62	108	61	23%	30%
90	BERESFORD CRUMP LLP	253	144	64	81%	144	69	152	6%	31%
91	SYMBIOSIS IP LIMITED	250	77	90	42%	62	84	93	24%	41%
92	ALPHA & OMEGA LAW CORPORATION	239	70	105	32%	225	173	39	1%	1%
93	JENSEN & SON	232	81	98	40%	92	77	104	14%	24%
94	RENISHAW PLC	230	56	200	2%	43	101	112	45%	46%
94	ABLETT & STEBBING	224	87	90	47%	73	90	85	21%	39%
96	CREATION IP LTD	220	62	147	13%	61	121	74	27%	31%
97	LONDON IP LTD	218	77	106	34%	89	112	65	16%	24%
98	ORIGIN LIMITED	213	59	171	5%	53	134	76	37%	39%
99	SCOTT & YORK	212	96	88	52%	84	81	125	17%	36%
100	BROOKS ACORDIA IP LAW, P.C.	211	114	79	64%	187	81	86	3%	8%
100	BROMHEAD JOHNSON	210	93	94	50%	112	89	82	12%	24%
102	SANDERSON & CO.	205	79	111	31%	86	127	63	18%	25%
102	IMPETUS IP LTD	198	69	149	14%	70	108	80	25%	29%
104	COULSON & RULE	196	123	83	66%	103	84	129	15%	45%
105	HARGREAVES ELSWORTH	195	72	138	19%	80	132	69	21%	25%
106	N.J. AKERS & CO.	194	100	96	51%	89	126	68	18%	36%
107	MINTZ LEVIN COHN FERRIS GLOVSKY AND POPEO, P.C.	193	225	73	94%	130	74	0	10%	182%
108	BARTLE READ	188	90	106	39%	117	102	77	13%	21%
109	BAWDEN & ASSOCIATES	186	87	109	37%	73	100	101	25%	39%
110	LOVEN PATENTS & TRADEMARKS	181	91	108	38%	103	123	75	17%	27%
111	DENTONS	180	156	77	77%	150	78	155	7%	32%
112	ATKINSON & COMPANY INTELLECTUAL PROPERTY LIMITED	170	75	158	10%	136	152	59	11%	12%
113	FIREBIRD IP	169	113	98	55%	124	96	99	13%	29%
114	MOHUN INTELLECTUAL PROPERTY LIMITED	165	73	171	6%	97	157	66	19%	21%
115	CAMERON IP	163	92	116	34%	109	118	91	17%	26%
116	LAWRIE IP LIMITED	163	95	112	37%	80	105	112	25%	39%
117	SWEETINBURGH & WINDSOR LTD	162	86	132	27%	124	112	88	14%	18%
118	ROPES & GRAY LLP	147	237	76	95%	187	83	200	4%	86%
119	BERESFORD & CO.	146	186	84	84%	136	87	241	12%	78%
120	HANNA IP	146	80	190	4%	97	146	79	22%	23%
121	ALISTAIR HINDLE & ASSOCIATES LIMITED	144	104	119	38%	77	105	157	31%	49%
122	DOWNING IP LIMITED	141	104	121	36%	157	107	102	8%	12%
123	FRESH IP	141	131	104	57%	121	110	116	16%	38%
124	PAGE HARGRAVE	140	137	103	59%	187	104	100	4%	11%
125	PATENT BOUTIQUE LLP	139	160	95	73%	147	91	166	10%	37%
126	TL BRAND & CO	138	118	110	49%	127	98	144	15%	30%
126	HALEY GUILIANO LLP	137	282	79	99%	0	93	123	0%	0%
128	BRIDLE INTELLECTUAL PROPERTY LIMITED	135	104	129	33%	97	150	86	24%	36%
129	RATIONAL IP LIMITED	132	85	190	5%	69	166	95	39%	41%
130	COLLER IP MANAGEMENT LIMITED	130	107	130	34%	75	123	154	35%	52%
131	SCHWEGMAN, LUNDBERG & WOESSNER, P.A.	123	219	87	90%	142	93	194	13%	133%
132	OLLILA LAW LIMITED	122	198	90	87%	124	95	234	18%	138%
133	SIMMONS & SIMMONS	120	219	89	90%	242	119	107	1%	8%
134	VAULT IP LIMITED	117	126	121	44%	136	127	112	15%	27%
135	DOWNING INTELLECTUAL PROPERTY LLP	116	132	115	49%	121	115	161	20%	39%
136	STERLING IP	105	114	145	29%	92	129	164	31%	44%
137	C.P.GREAVES & CO	103	132	130	43%	106	134	150	28%	49%
137	K W PETERS & CO	103	110	154	21%	112	139	126	24%	31%
139	BECKHAMS IP	99	97	218	2%	127	183	89	21%	22%
139	D.W. & S.W. GEE	99	144	124	51%	153	110	185	12%	24%
141	FRANKS & CO	99	100	200	4%	110	161	104	26%	27%
142	EDWARD EVANS & CO.	98	127	140	34%	103	142	144	31%	46%
143	IPENTUS LIMITED	97	97	0	0%	86	180	111	37%	37%
144	ARCHER-IP	96	102	218	2%	142	159	97	17%	17%
145	NIGEL BROOKS CPA	95	103	218	2%	106	0	89	31%	31%
146	KING & SPALDING LLP	91	0	101	100%	225	97	0	2%	0%
147	ELLIS IP LTD	89	132	145	34%	150	142	129	15%	22%
147	GRAHAM & JAMES LLP	89	160	121	57%	117	123	229	27%	63%
149	SCINTILLA INTELLECTUAL PROPERTY LTD	87	118	159	18%	121	158	121	26%	32%
150	IPHEIONS INTELLECTUAL PROPERTY	82	114	185	9%	101	159	144	38%	41%
151	INCOMPASS IP EUROPE LIMITED	80	152	138	46%	167	133	161	13%	23%
152	IP ASSET LLP	79	149	140	42%	89	146	194	43%	74%
152	L.J. BRAY & CO.	79	111	0	0%	136	196	102	23%	23%
154	DEREK JACKSON ASSOCIATES	78	170	126	60%	153	134	166	15%	39%
155	IP-ACTIVE.COM LIMITED	78	118	185	9%	127	176	118	27%	30%
156	HINDLES LIMITED	76	127	169	14%	157	161	116	14%	17%
157	HCR PATENTS	75	114	0	0%	112	0	107	33%	33%
157	BLACK AND ASSOCIATES LIMITED	73	127	181	11%	101	176	147	42%	48%
159	J. R. BADGER & CO.	73	123	190	8%	167	176	109	14%	15%
160	SNIPE CHANDRAHASEN LLP	72	150	149	38%	157	161	123	15%	24%
161	BAILEY IP CONSULTING	68	127	208	4%	147	173	129	21%	22%
162	FIRST THOUGHT IP LTD	68	135	171	15%	140	166	140	25%	29%
163	ALBAN PATENT AGENCY	67	165	144	46%	193	155	129	7%	14%
163	ATHERTON KNOWLES	67	166	140	49%	150	146	166	19%	38%
163	SHANGHAI BRIDGE INTELLECTUAL PROPERTY AGENCY CO., LTD.	67	195	124	75%	0	121	263	0%	0%
166	KARSSEN LIMITED	61	137	200	7%	172	170	134	13%	14%
167	GALLAFENTS LLP	60	140	190	10%	140	187	138	28%	31%
168	K2 IP LIMITED	59	152	159	27%	110	155	213	44%	60%
168	ROUSE	59	244	120	90%	193	129	253	8%	83%
170	CRASKE & CO.	58	141	197	9%	167	188	126	17%	19%
171	HOWARD LOCK INTELLECTUAL PROPERTY	58	143	185	12%	181	188	121	12%	14%
172	JCIP LIMITED	58	191	135	67%	157	144	200	19%	58%
173	FAIRFIELD IP LIMITED	56	147	177	16%	153	230	119	21%	26%
174	INTERVET INTERNATIONAL B.V.	52	151	181	15%	0	129	0	0%	0%
175	J. P. PEEL & CO LTD	52	147	197	10%	157	180	147	21%	23%
176	HILL HAMPTON	51	163	165	27%	172	150	200	16%	22%
176	LOCK IP	49	144	0	0%	157	0	126	22%	22%
178	M.J.P. DEANS	48	166	165	29%	157	218	136	23%	32%
178	BOXALL IPM LTD	47	170	159	34%	144	161	191	32%	48%
180	PARK GROVE IP	47	208	140	70%	193	144	234	11%	36%
181	THOMPSON COOPER LLP	46	0	127	100%	0	137	0	0%	0%
181	JENNIFER ELIZABETH HAYES UNO	45	253	134	91%	0	138	0	0%	0%
183	MARCHES INTELLECTUAL PROPERTY LIMITED	44	247	135	89%	242	139	241	2%	20%
184	STANLEYS	44	173	165	32%	181	161	179	16%	23%
185	DR WALTHER WOLFF & CO	43	181	159	37%	172	0	134	19%	30%
186	GRAHAM COLES & CO	43	152	0	0%	171	211	143	21%	21%
187	PATENT PROTECT	42	155	0	0%	157	0	140	26%	26%
187	RM PATENT SERVICES	40	157	0	0%	172	188	157	20%	20%
189	INVICTA IP LTD	39	158	0	0%	187	208	147	15%	15%
190	MILTONS IP	39	282	137	97%	0	146	234	0%	0%
190	RANK BRIMAR LIMITED	38	163	233	3%	130	238	174	53%	54%
192	AMS IP LIMITED	36	198	155	56%	205	183	164	11%	25%
193	A. MESSULAM & CO.	34	228	152	71%	167	166	234	29%	100%
194	LAUDENS	33	173	208	9%	157	180	200	33%	37%
195	THOMPSON GRAY LLP	33	176	200	12%	134	201	213	58%	66%
195	VENTURE PROOF LIMITED	33	168	0	0%	147	218	179	42%	42%
195	FILEMOT TECHNOLOGY LAW LTD	32	208	156	56%	225	170	188	6%	14%
198	IPCA CONSULTING	31	170	0	0%	0	0	140	0%	0%
199	OGIVE INTELLECTUAL PROPERTY LTD	31	190	169	35%	172	176	200	26%	40%
200	ARMSTRONG IP	30	173	0	0%	213	188	174	10%	10%