Inventor · disambiguated record
Tatsuo Igawa
Also filed as: IGAWA TATSUO · SAWADA HIROJI
24 granted patents·586 citations·filing 1976–2000
97Inventor score
Top patents by PatentIndex Score
24 records- 0194US4586790ADisplay panel having uniaxially-stretched organic polymer film as the substrateHITACHI LTD·Filed 1983·Granted May 6, 1986·124 cites·7 claims
- 0291US5832350ADeveloping apparatus and color electrophotographic apparatus using the sameHITACHI LTD·Filed 1997·Granted Nov 3, 1998·62 cites·36 claims
- 0389US6443560B1Recording head and inkjet recording device having separately arranged ink chambers and ink discharge unitHITACHI LTD·Filed 2000·Granted Sep 3, 2002·37 cites·15 claims
- 0484US4362771ALiquid crystal display element with gap controlling material and process for production thereofHITACHI LTD·Filed 1981·Granted Dec 7, 1982·50 cites·28 claims
- 0581US4505546ALiquid crystal display deviceHITACHI LTD·Filed 1982·Granted Mar 19, 1985·45 cites·8 claims
- 0677US6604816B1Ink-jet recording head and ink-jet recorderHITACHI LTD·Filed 2000·Granted Aug 12, 2003·18 cites·32 claims
- 0777US4591886ADriving method and apparatus for optical printer with liquid-crystal switching elementHITACHI LTD·Filed 1984·Granted May 27, 1986·39 cites·19 claims
- 0872US5321477AImage forming apparatus capable of preventing the winding on the image carrierHITACHI LTD·Filed 1992·Granted Jun 14, 1994·23 cites·31 claims
- 0968US5252954AMultiplexed driving method for an electrooptical device, and circuit thereforHITACHI LTD·Filed 1990·Granted Oct 12, 1993·33 cites·8 claims
- 1067US5860049ADeveloping apparatus and picture image forming apparatusHITACHI LTD·Filed 1997·Granted Jan 12, 1999·19 cites·7 claims
- 1165US4783149ATime-sharing drive liquid crystal optical switch array and optical printer using this optical switch arrayHITACHI LTD·Filed 1986·Granted Nov 8, 1988·25 cites·14 claims
- 1261US5095376AApparatus and method for driving an optical printer having a liquid crystal optical switchHITACHI LTD·Filed 1990·Granted Mar 10, 1992·17 cites·22 claims
- 1360US5559578AElectrostatic recording apparatus with electrified cap and managing system thereofHITACHI LTD·Filed 1993·Granted Sep 24, 1996·12 cites·26 claims
- 1456US4769659APrinter utilizing optical switch elementsUMEDA TAKAO·Filed 1987·Granted Sep 6, 1988·18 cites·2 claims
- 1553US4345120ADistributorNISSAN MOTOR·Filed 1980·Granted Aug 17, 1982·8 cites·6 claims
- 1650US6557981B1Ink jet recorderHITACHI LTD·Filed 2000·Granted May 6, 2003·4 cites·18 claims
- 1750US4746196AMultiplexed driving method for an optical switching element employing ferroelectric liquid crystalHITACHI LTD·Filed 1987·Granted May 24, 1988·13 cites·10 claims
- 1850US4712876ADriving ferroelectric liquid crystal printers via short circuitingHITACHI LTD·Filed 1985·Granted Dec 15, 1987·12 cites·2 claims
- 1949US4468543AIgnition distributorNISSAN MOTOR·Filed 1982·Granted Aug 28, 1984·6 cites·5 claims
- 2043US4219707ADistributor with coated alkaline earth oxide electrodeHITACHI LTD·Filed 1978·Granted Aug 26, 1980·4 cites·3 claims
- 2141US5373351AElectrostatic recording apparatus and managing system thereofHITACHI LTD·Filed 1992·Granted Dec 13, 1994·5 cites·10 claims
- 2239US5574546ADeveloping apparatus for an electrophotographic machineHITACHI LTD·Filed 1995·Granted Nov 12, 1996·5 cites·22 claims
- 2335US5177531AElectrostatic recorder and electrostatic latent image measuring instrumentHITACHI LTD·Filed 1991·Granted Jan 5, 1993·5 cites·24 claims
- 2435US4145101AMethod for manufacturing gas insulated electrical apparatusHITACHI LTD·Filed 1976·Granted Mar 20, 1979·2 cites·24 claims
Join the waitlist — get patent alerts
Get an alert when Tatsuo Igawa files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →