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Inventor

Hiroshi Usami

Inventor
Yokohama, JP

Overview

6→
Patents
1988–2005
Patent span
Physics
Primary field (CPC G)

Patents· 6 as inventor

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

G11Bprimary
G11BInformation storage based on relative movement between record carrier and transducer43%
F24FAir-conditioning14%
G05DSystems for controlling or regulating non-electric variables14%
H04BTransmission14%
H04WWireless communication networks14%
PatentTitleYear
6,879,845'Wireless communication method and system using beam direction-variable antenna'20056,442,146'Time-division multiple-access communication system'20026,157,508'Magnetic recording/playback apparatus'20005,372,545'Ventilator with a sensor'19944,933,925'Optical tracking control apparatus for controlling a tracking of a light beam which scans an information recording disc using pre-formatted guide tracks having an interrupted signal format'19904,777,543'Tracking correction for a rotary head by detection of the minimum signal level'1988

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1988–2005Patents assigned to HITACHI LTD (3)· patent assignee history
1988Based in Katsuta, JP· patent location history
1990–2000Patents assigned to TEAC CORP (2)· patent assignee history
1990–2000Based in Tokyo, JP· patent location history
1994Based in Aichi, JP· patent location history
2002Patents assigned to COMM RES LAB MINISTRY OF POSTS (1)· patent assignee history
2002Patents assigned to MITSUBISHI ELECTRIC CORP (1)· patent assignee history
2002Patents assigned to NIPPON TELEGRAPH & TELEPHONE (1)· patent assignee history
2002–2005Based in Yokohama, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD31988–2005
TEAC CORP21990–2000
COMM RES LAB MINISTRY OF POSTS12002
MITSUBISHI ELECTRIC CORP12002
NIPPON TELEGRAPH & TELEPHONE12002
Locations
LocationPatentsSpan
Yokohama, JP22002–2005
Tokyo, JP21990–2000
Aichi, JP11994
Katsuta, JP11988