Inventor

Sakuji Watanabe

Inventor

Warabi, JP

Overview

33→

Patents

1976–1987

Patent span

Physics

Primary field (CPC G)

Patents· 33 as inventor

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

G03Bprimary

G03BApparatus or arrangements for taking photographs or for projecting or viewing them68%

G02BOptical elements, systems or apparatus11%

H05BElectric heating8%

G01NInvestigating or analysing materials by determining their chemical or physical properties5%

G01JMeasurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infrared, visible or ultraviolet light3%

G05FSystems for regulating electric or magnetic variables3%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests3%

PatentTitleYear

4,634,851'Control device for automatic focusing'1987 4,564,281'Signal selector for automatic exposure apparatus of camera'1986 4,497,564'Exposure mode setting device in an exposure control apparatus of a camera'1985 4,477,169'Automatic focusing camera system and photographing lens structure therefor'1984 4,473,286'Automatic focusing device of a camera'1984 4,457,606'Motor drive unit for camera'1984 4,422,739'Auto focus camera'1983 4,408,854'Automatic focus detecting apparatus of a camera'1983 4,396,269'Shutter release locking device'1983 4,389,108'Power supply control circuit in a camera'1983 4,385,819'Display device in automatic exposure control camera'1983 4,340,284'Temperature-compensated signal transmitting device'1982 4,316,660'Alarm device in an automatic exposure camera'1982 4,307,948'Diaphragm control apparatus for camera'1981 4,275,953'Exposure parameter information generating circuit in a single lens reflex camera'1981 4,269,496'Power supply circuit for camera'1981 4,264,164'Memory holding device in a single lens reflex camera'1981 4,239,358'Alarm device control system in a camera'1980 4,238,146'Sound alarm device in a camera'1980 4,204,755'Display device in an automatic exposure control camera'1980 4,196,989'TTL Metering system automatic exposure control camera'1980 4,189,219'Control system for flash photographing apparatus'1980 4,187,017'Motor drive device in a camera'1980 4,176,933'Indicating apparatus for camera'1979 4,160,160'Circuit for integrating a quantity of light in an automatic control type flash unit'1979 4,129,366'Photometric device for a camera'1978 4,122,465'Device for indicating condition of exposure in an automatic control type electronic flash unit for flash photography'1978 4,104,666'Exposure control circuit for camera'1978 4,099,115'Constant-voltage regulated power supply'1978 4,089,013'Flashlight information signal generating device for a camera'1978 4,045,142'Metering device for cameras'1977 3,992,104'Automatic polarization analyzer device'1976 3,988,067'Automatic polarization analyzing device'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1987Patents assigned to NIPPON KOGAKU KK (33)· patent assignee history

1976–1980Based in Yono, JP· patent location history

1976Based in Urawa, JP· patent location history

1979–1987Based in Warabi, JP· patent location history

1985Based in Omiya, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
NIPPON KOGAKU KK	33	1976–1987

Locations

Location	Patents	Span
Warabi, JP	22	1979–1987
Yono, JP	9	1976–1980
Omiya, JP	1	1985
Urawa, JP	1	1976