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Inventor

Shiro Hirai

Inventor
Tama, JP

Overview

2→
Patents
1981–1983
Patent span
Physics
Primary field (CPC G)

Patents· 2 as inventor

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

G02Bprimary
G02BOptical elements, systems or apparatus33%
G11BInformation storage based on relative movement between record carrier and transducer33%
Y10TTechnical subjects covered by former us classification33%
PatentTitleYear
4,368,975'Projection device'19834,246,619'Electromagnetic transducer head'1981

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1981Patents assigned to VICTOR COMPANY OF JAPAN (1)· patent assignee history
1981Based in Yokohama, JP· patent location history
1983Patents assigned to CANON KK (1)· patent assignee history
1983Based in Tama, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
CANON KK11983
VICTOR COMPANY OF JAPAN11981
Locations
LocationPatentsSpan
Tama, JP11983
Yokohama, JP11981