Inventor

MASAKI SHIRAISHI

Inventor

Overview

6→

Patents

2022–2026

Patent span

Electricity

Primary field (CPC H)

Patents· 6 as inventor

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

H01Lprimary

H01LSemiconductor devices25%

H10DInorganic electric semiconductor devices25%

H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems13%

B29CShaping or joining of plastics6%

B29KIndexing scheme associated with subclasses b29b, b29c or b29d, relating to moulding materials or to materials for moulds, reinforcements, fillers or preformed parts, e.g. inserts6%

B29LIndexing scheme associated with subclass b29c, relating to particular articles6%

H03KPulse technique6%

H10PGeneric processes or apparatus for the manufacture or treatment of devices covered by class h106%

H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h106%

PatentTitleYear

12,589,526Golf ball manufacturing method2026 12,300,716Semiconductor device and power conversion device2025 11,881,514Semiconductor device and termination structure2024 11,757,444Semiconductor element drive device and power conversion apparatus2023 11,296,212Semiconductor device and power conversion device2022 11,282,937Semiconductor device and power conversion device2022

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2022–2025Patents assigned to HITACHI POWER SEMICONDUCTOR DEVICE LTD (4)· patent assignee history

2022–2026Based in JP· patent location history

2023Patents assigned to HITACHI ASTEMO LTD (1)· patent assignee history

2026Patents assigned to BRIDGESTONE SPORTS CO LTD (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HITACHI POWER SEMICONDUCTOR DEVICE LTD	4	2022–2025
BRIDGESTONE SPORTS CO LTD	1	2026
HITACHI ASTEMO LTD	1	2023

Locations

Location	Patents	Span
JP	6	2022–2026