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Inventor

HIROAKI KOYAMA

Inventor
JP

Overview

2→
Patents
2023–2024
Patent span
Performing operations
Primary field (CPC B)

Patents· 2 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

B01Jprimary
B01JChemical or physical processes, e.g. catalysis or colloid chemistry25%
B60RVehicles, vehicle fittings, or vehicle parts, not otherwise provided for25%
H01MProcesses or means, e.g. batteries, for the direct conversion of chemical energy into electrical energy25%
Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution25%
PatentTitleYear
12,176,547Catalyst layer for polymer electrolyte fuel cells, membrane-electrode assembly, and polymer electrolyte fuel cell202411,667,261Gas generator2023

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2023Patents assigned to NIPPON KAYAKU KK (1)· patent assignee history
2023–2024Based in JP· patent location history
2024Patents assigned to TOPPAN PRINTING CO LTD (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
NIPPON KAYAKU KK12023
TOPPAN PRINTING CO LTD12024
Locations
LocationPatentsSpan
JP22023–2024