Inventor

Hideo Maeda

Inventor

Tokyo, JP

Overview

41→

Patents

1984–2021

Patent span

Physics

Primary field (CPC G)

Patents· 41 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 transducer18%

H01MProcesses or means, e.g. batteries, for the direct conversion of chemical energy into electrical energy12%

Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution12%

F24FAir-conditioning8%

G01DMeasuring not specially adapted for a specific variable7%

B41JTypewriters5%

G02BOptical elements, systems or apparatus5%

H05KPrinted circuits3%

H10FInorganic semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation3%

Y10TTechnical subjects covered by former us classification3%

PatentTitleYear

10,981,395Printer2021 10,953,676Printer2021 10,906,327Printer2021 10,544,425Plant having increased resistance or susceptibility to 4-HPPD inhibitor2020 8,649,176'Display apparatus including cooling section'2014 7,642,325'Non-sticky water-based conformal coating material'2010 7,534,517'Fuel cell and method for manufacture thereof'2009 7,141,328'Fuel cell'2006 6,500,579'Fuel cell structure'2002 6,348,280'Fuel cell'2002 6,329,092'Polymer electrolyte fuel cell and systems therefor'2001 6,270,917'Fuel cell'2001 5,956,302'Optical pick-up device and method using a high-density double diffraction grating'1999 5,812,320'Optical encoder having high resolution'1998 5,775,119'Air conditioner outdoor unit housing'1998 5,735,135'Air conditioner'1998 5,652,426'Optical encoder having high resolution'1997 5,579,111'Encoding apparatus for making measurements of two-dimensional displacement of an object'1996 5,574,558'Optical encoding apparatus for measuring displacement of an object using diffraction gratings and twice-diffracted and twice-transmitted light'1996 5,572,323'Infinitesimal displacement measuring apparatus and optical pick-up unit'1996 5,458,669'Process for purification of gallium material'1995 5,331,650'Light source device and optical pickup using light source device'1994 5,325,348'Wavelength converting element and system for recording and reproducing optical information'1994 5,278,817'Optical pick-up for use with an opto-magnetic signal'1994 5,115,423'Optomagnetic recording/reproducing apparatus'1992 5,107,477'Integrated optical pick-up device'1992 5,101,389'Optical information recording/reproducing apparatus'1992 5,097,462'Integrated optical pick-up device'1992 5,093,749'Diffraction grating having incident and emitting side gratings'1992 5,065,206'Photoelectric converting device with accumulating gate region'1991 5,060,212'Integrated optical pick-up device'1991 5,029,154'Optical reproducing apparatus'1991 5,019,464'Molten carbonate fuel battery with electrolyte migration control'1991 4,952,996'Static induction and punching-through photosensitive transistor devices'1990 4,935,911'Optical head device for recording and reproducing information'1990 4,869,075'Air conditioner'1989 4,847,167'Fiber-reinforced metallic composite material'1989 4,793,148'Air conditioning apparatus'1988 4,697,165'Ceramic heater and a method of manufacturing the same'1987 4,669,534'Air conditioner'1987 4,448,404'Device for holding a sheet-like sample'1984

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1987–1998Patents assigned to SANYO ELECTRIC CO (5)· patent assignee history

1987–1998Based in Ashikaga, JP· patent location history

1990–1999Patents assigned to RICOH KK (17)· patent assignee history

1990–2021Based in Tokyo, JP· patent location history

1990–1999Based in Yokohama, JP· patent location history

1991–2009Patents assigned to MITSUBISHI ELECTRIC CORP (7)· patent assignee history

2014–2020Patents assigned to MAEDA HIDEO (2)· patent assignee history

2014Based in Osaka, JP· patent location history

2020Based in Tsukuba, JP· patent location history

2021Patents assigned to SATO HOLDINGS KK (3)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
RICOH KK	17	1990–1999
MITSUBISHI ELECTRIC CORP	7	1991–2009
SANYO ELECTRIC CO	5	1987–1998
SATO HOLDINGS KK	3	2021
MAEDA HIDEOself	2	2014–2020

Locations

Location	Patents	Span
Tokyo, JP	16	1990–2021
Yokohama, JP	12	1990–1999
Ashikaga, JP	5	1987–1998
Tsukuba, JP	1	2020
Osaka, JP	1	2014