Inventor · disambiguated record
Shigeru Morokawa
Also filed as: HASHIMOTO YUKIO · MOROKAWA SHIGERU · OGAWA HIROSHI · WATANABE MINORU
65 granted patents·1,607 citations·filing 1974–2003
99Inventor score
Files withCITIZEN WATCH CO LTD61CITIZEN HOLDINGS CO LTD1DAIGO KUNIHIRO1JAPAN SCIENCE & TECH CORP1MOROKAWA SHIGERU1
Top patents by PatentIndex Score
65 records- 0196US5815233AOptical device containing a liquid crystal element for changing optical characteristics of a lens elementCITIZEN WATCH CO LTD·Filed 1997·Granted Sep 29, 1998·223 cites·15 claims
- 0296US3937004APortable miniature type information treating deviceCITIZEN WATCH CO LTD·Filed 1974·Granted Feb 10, 1976·81 cites·3 claims
- 0394US3971012ADisplay device employing special-purpose monogramsCITIZEN WATCH CO LTD·Filed 1974·Granted Jul 20, 1976·57 cites·3 claims
- 0493US4016476ABooster circuitsCITIZEN WATCH CO LTD·Filed 1975·Granted Apr 5, 1977·38 cites·19 claims
- 0592US3998043AElectric timepiece for displaying the operating condition thereofCITIZEN WATCH CO LTD·Filed 1974·Granted Dec 21, 1976·50 cites·6 claims
- 0691US4100540AMethod of driving liquid crystal matrix display device to obtain maximum contrast and reduce power consumptionCITIZEN WATCH CO LTD·Filed 1976·Granted Jul 11, 1978·35 cites·5 claims
- 0791US3938316ATemperature compensated electronic timepieceCITIZEN WATCH CO LTD·Filed 1974·Granted Feb 17, 1976·51 cites·2 claims
- 0890US4630122ATelevision receiver with liquid crystal matrix display panelCITIZEN WATCH CO LTD·Filed 1984·Granted Dec 16, 1986·54 cites·22 claims
- 0990US4453834AElectronic timepiece with temperature compensationCITIZEN WATCH CO LTD·Filed 1982·Granted Jun 12, 1984·56 cites·11 claims
- 1089US4663670ATelevision receiver having a liquid crystal display deviceCITIZEN WATCH CO LTD·Filed 1984·Granted May 5, 1987·68 cites·12 claims
- 1188US4679043AMethod of driving liquid crystal matrix displayCITIZEN WATCH CO LTD·Filed 1983·Granted Jul 7, 1987·59 cites·9 claims
- 1288US4337529APace timing deviceCITIZEN WATCH CO LTD·Filed 1979·Granted Jun 29, 1982·136 cites·25 claims
- 1387US6826209B1Ultrabroad-band variable-wavelength wavelength-multiplexed pulse waveform shaping deviceJAPAN SCIENCE & TECH CORP·Filed 2000·Granted Nov 30, 2004·40 cites·12 claims
- 1486US4094137AVoltage conversion system for electronic timepieceCITIZEN WATCH CO LTD·Filed 1976·Granted Jun 13, 1978·31 cites·39 claims
- 1584US4824213ALiquid crystal display having opaque portions on the electrodesCITIZEN WATCH CO LTD·Filed 1984·Granted Apr 25, 1989·49 cites·10 claims
- 1683US4150535AElectronic timepieceCITIZEN WATCH CO LTD·Filed 1975·Granted Apr 24, 1979·13 cites·29 claims
- 1783US3978650AElectric timepieceCITIZEN WATCH CO LTD·Filed 1974·Granted Sep 7, 1976·27 cites·7 claims
- 1882US4581649AImage pickup systemCITIZEN WATCH CO LTD·Filed 1984·Granted Apr 8, 1986·32 cites·10 claims
- 1980US4302829AElectronic timepieceCITIZEN WATCH CO LTD·Filed 1978·Granted Nov 24, 1981·11 cites·8 claims
- 2080US4298971AElectronic timpieceCITIZEN WATCH CO LTD·Filed 1979·Granted Nov 3, 1981·15 cites·9 claims
- 2179US4259715AVoltage conversion system for electronic timepieceCITIZEN WATCH CO LTD·Filed 1978·Granted Mar 31, 1981·21 cites·28 claims
- 2275US4232510ATimepieceCITIZEN WATCH CO LTD·Filed 1977·Granted Nov 11, 1980·22 cites·6 claims
- 2374US5654782ALiquid crystal optical modulator device with each electrode width smaller than both the liquid crystal thickness and the electrode gapsCITIZEN WATCH CO LTD·Filed 1995·Granted Aug 5, 1997·48 cites·15 claims
- 2473US3948036AElectronic timepieceCITIZEN WATCH CO LTD·Filed 1974·Granted Apr 6, 1976·17 cites·18 claims
- 2572US4024416AMethod for controlling frequency of electrical oscillations and frequency standard for electronic timepieceCITIZEN WATCH CO LTD·Filed 1976·Granted May 17, 1977·13 cites·22 claims
- 2670US4441825ALow-power integrated circuit for an electronic timepieceCITIZEN WATCH CO LTD·Filed 1978·Granted Apr 10, 1984·12 cites·9 claims
- 2769US3961840ADriving circuit for liquid-crystal displayCITIZEN WATCH CO LTD·Filed 1974·Granted Jun 8, 1976·17 cites·8 claims
- 2868US4107915AElectronic timepieceCITIZEN WATCH CO LTD·Filed 1976·Granted Aug 22, 1978·11 cites·5 claims
- 2968US4015419AElectronic timepieceCITIZEN WATCH CO LTD·Filed 1976·Granted Apr 5, 1977·11 cites·10 claims
- 3067US3940919AElectronic wristwatch with electronic sound emitter deviceCITIZEN WATCH CO LTD·Filed 1974·Granted Mar 2, 1976·15 cites·8 claims
- 3166US6894952B2Timer of electric timepieceCITIZEN WATCH CO LTD·Filed 2001·Granted May 17, 2005·10 cites·11 claims
- 3265US4346350AFET Quartz oscillatorsCITIZEN WATCH CO LTD·Filed 1980·Granted Aug 24, 1982·18 cites·8 claims
- 3364US6999058B1Power supply circuit for driving liquid crystal display deviceCITIZEN WATCH CO LTD·Filed 2000·Granted Feb 14, 2006·8 cites·4 claims
- 3464US4602292ADriving system for matrix display deviceCITIZEN WATCH CO LTD·Filed 1984·Granted Jul 22, 1986·21 cites·4 claims
- 3564US4465999AMatrix driving method for electro-optical display deviceCITIZEN WATCH CO LTD·Filed 1979·Granted Aug 14, 1984·19 cites·5 claims
- 3664US4099371AElectronic optical display alarm timepieceCITIZEN WATCH CO LTD·Filed 1975·Granted Jul 11, 1978·10 cites·1 claims
- 3764US4094135ASwitch control unit for electronic timepieceCITIZEN WATCH CO LTD·Filed 1976·Granted Jun 13, 1978·10 cites·12 claims
- 3864US4067187AElectronic timepieceCITIZEN WATCH CO LTD·Filed 1976·Granted Jan 10, 1978·10 cites·12 claims
- 3961US4205518AVoltage conversion system for electronic timepieceCITIZEN WATCH CO LTD·Filed 1978·Granted Jun 3, 1980·11 cites·16 claims
- 4060US4441826AElectronic timepieceCITIZEN WATCH CO LTD·Filed 1982·Granted Apr 10, 1984·12 cites·3 claims
- 4160US3999370ATemperature compensated electronic timepieceCITIZEN WATCH CO LTD·Filed 1975·Granted Dec 28, 1976·15 cites·5 claims
- 4258US6301198B1Electronic timepieceCITIZEN WATCH CO LTD·Filed 1995·Granted Oct 9, 2001·27 cites·6 claims
- 4358US4292680AElectronic timepieceCITIZEN WATCH CO LTD·Filed 1978·Granted Sep 29, 1981·4 cites·8 claims
- 4454US7436737B2Electric timepieceCITIZEN HOLDINGS CO LTD·Filed 2003·Granted Oct 14, 2008·6 cites·25 claims
- 4554US5101116AMulti-level voltage generator to drive lcdCITIZEN WATCH CO LTD·Filed 1990·Granted Mar 31, 1992·18 cites·5 claims
- 4653US4270194AElectronic alarm timepieceCITIZEN WATCH CO LTD·Filed 1978·Granted May 26, 1981·3 cites·24 claims
- 4752US6023252ALiquid crystal display deviceCITIZEN WATCH CO LTD·Filed 1995·Granted Feb 8, 2000·18 cites·11 claims
- 4852US4302828AElectronic timepieceCITIZEN WATCH CO LTD·Filed 1978·Granted Nov 24, 1981·3 cites·2 claims
- 4951US7084976B2Concentration measuring instrumentCITIZEN WATCH CO LTD·Filed 2001·Granted Aug 1, 2006·6 cites·10 claims
- 5051US4119867AFrequency division circuitCITIZEN WATCH CO LTD·Filed 1976·Granted Oct 10, 1978·6 cites·5 claims
Showing the top 50 of 65 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Shigeru Morokawa 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 →