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Inventor

Hiroaki Hiratsuka

Inventor
Ushiku, JP

Overview

2→
Patents
1984–1992
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.

G03Gprimary
G03GElectrography25%
G11BInformation storage based on relative movement between record carrier and transducer25%
G11CStatic stores25%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests25%
PatentTitleYear
5,124,944'Optical storage medium and storage process'19924,426,434'Electrophotographic photoreceptor and preparation thereof'1984

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1984–1992Patents assigned to NIPPON TELEGRAPH & TELEPHONE (2)· patent assignee history
1984Based in Tomobe, JP· patent location history
1992Based in Ushiku, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
NIPPON TELEGRAPH & TELEPHONE21984–1992
Locations
LocationPatentsSpan
Ushiku, JP11992
Tomobe, JP11984