Patent landscape

Hydrogen Electrolyzers Supplier Landscape

A view of who is investing in water electrolysis and electrolytic cell IP, and who files globally. For sales and BD teams selling into green hydrogen projects, EPC contractors, and electrolyzer builders: use the ranking to see where industrial gas majors, power equipment makers, and chemical plant specialists are concentrating R&D, and where that activity crosses borders.

Companies tracked

Distinct assignees with at least one international patent family in this segment.

Top company

Bosch

299 international families, filing across 13 offices.

Top 5 share of top 25

43%

Share of international families among the top 25 held by the top 5 filers.

Top 25 by international patent families

International family counts first, since those are what travel across markets. “Since 2018” and “Since 2023” are all families (international plus single-office) first filed on or after that year.

#	Company	HQ	Intl families	Since 2018	Since 2023	Filing offices	Intl share
1	Bosch	Germany	299	595	425	13	50%
2	Siemens Energy	Germany	218	248	147	19	88%
3	Panasonic	Japan	144	280	75	8	51%
4	Honda Motor	Japan	138	167	70	7	83%
5	Toshiba	Japan	121	187	78	9	65%
6	Mitsubishi Heavy Industries	Japan	81	92	58	11	88%
7	Toyota Motor	Japan	79	149	75	9	53%
8	Topsoe	Denmark	79	102	49	29	77%
9	Asahi Kasei	Japan	77	134	41	16	57%
10	Hyundai Motor Group (incl. Kia)	South Korea	76	106	54	6	72%
11	Dana (Reinz-Dichtungs)	Germany	72	77	46	8	94%
12	Siemens	Germany	68	117	26	24	58%
13	Toshiba Energy Systems and Solutions	Japan	67	68	31	8	99%
14	Schaeffler Technologies	Germany	62	113	73	10	55%
15	Bloom Energy	United States	62	90	73	8	69%
16	NGK Insulators	Japan	57	117	76	7	49%
17	Thyssenkrupp Nucera	Germany	54	56	31	24	96%
18	Toshiba Energy System and Solution	Japan	49	120	48	8	41%
19	Air Liquide	France	49	74	31	15	66%
20	Mitsubishi Power	Japan	49	49	30	9	100%
21	Hitachi	Japan	48	71	33	5	68%
22	Johnson Matthey Hydrogen Technologies	United Kingdom	48	56	41	10	86%
23	Linde	Germany	47	80	30	19	59%
24	Gree Electric	China	44	169	51	22	26%
25	TotalEnergies OneTech	France	43	60	39	16	72%

Methodology

Patent families first filed in 2018 or later, matched on CPC or IPC codes. “International” means filed in two or more patent offices. Source is Google Patents Public Data via BigQuery.

Codes: CPC and IPC C25B1/04 and C25B9 (water electrolysis and electrolytic cells).

Companies are merged across name variants (for example, several spelling and romanization variants of the same assignee are rolled up into one row). Universities and government research bodies are excluded, so the ranking reflects commercial filers.

Rankings reflect patent activity, not revenue. A heavy filer may be protecting a research program that has not shipped, and a low filer may still be a dominant supplier.

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