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Inventor

Masayoshi Hirai

Inventor
Saitama, JP

Overview

19→
Patents
1985–2020
Patent span
Physics
Primary field (CPC G)

Patents· 19 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 them37%
H01QAntennas, i.e. radio aerials19%
G02BOptical elements, systems or apparatus15%
H04MTelephonic communication15%
F23NRegulating or controlling combustion4%
F24CDomestic stoves or ranges4%
H03FAmplifiers4%
H04BTransmission4%
PatentTitleYear
10,715,086Amplifier circuit20207,840,243'Antenna arrangement in a mobile terminal apparatus'20107,787,915'Folding type portable wireless unit'20107,705,789'Portable wireless device'20107,626,554'Collapsible mobile radio device'20097,130,591'Cell phone'20065,671,458'Photographic camera with exposure size corrected for position of exit pupil of taking lens'19974,971,427'Zoom lens drive mechanism of a camera'19904,958,178'Collapsible mounting type camera with zoom lens'19904,903,059'Camera'19904,887,109'Viewfinder for a camera with changeable focal length'19894,792,822'Camera with changeable focal length'19884,771,302'Camera with orientable taking lens and a device for attaching a flash unit'19884,751,546'Display device for cameras'19884,723,141'Camera having a provision for multiple exposures'19884,720,721'Film wind-up control apparatus for a camera'19884,720,718'Reflex camera'19884,720,719'Film wind-up apparatus'19884,521,183'Cooking appliance'1985

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1985–2006Patents assigned to MATSUSHITA ELECTRIC INDUSTRIAL CO LTD (2)· patent assignee history
1985Based in Nara, JP· patent location history
1988–1997Patents assigned to FUJI PHOTO FILM CO LTD (12)· patent assignee history
1988–1997Based in Saitama, JP· patent location history
2006–2010Based in Yokohama, JP· patent location history
2009–2010Patents assigned to PANASONIC CORP (4)· patent assignee history
2009–2010Based in Kanagawa, JP· patent location history
2020Patents assigned to DENSO TEN LTD (1)· patent assignee history
2020Based in Kobe, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
FUJI PHOTO FILM CO LTD121988–1997
PANASONIC CORP42009–2010
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD21985–2006
DENSO TEN LTD12020
Locations
LocationPatentsSpan
Saitama, JP121988–1997
Kanagawa, JP32009–2010
Yokohama, JP22006–2010
Kobe, JP12020
Nara, JP11985