Inventor · disambiguated record
Fukuo Sekiya
Also filed as: KOGA KEIICHIRO · MOROKAWA SHIGERU · SEKIYA FUKUO
53 granted patents·756 citations·filing 1974–1986
99Inventor score
Top patents by PatentIndex Score
53 records- 0196US3937004APortable miniature type information treating deviceCITIZEN WATCH CO LTD·Filed 1974·Granted Feb 10, 1976·81 cites·3 claims
- 0293US4117475ADriver circuit for electrochromic display deviceCITIZEN WATCH CO LTD·Filed 1976·Granted Sep 26, 1978·37 cites·11 claims
- 0393US4016476ABooster circuitsCITIZEN WATCH CO LTD·Filed 1975·Granted Apr 5, 1977·38 cites·19 claims
- 0491US4149146ADriver circuit for electrochromic display deviceCITIZEN WATCH CO LTD·Filed 1977·Granted Apr 10, 1979·47 cites·3 claims
- 0591US4001808AElectronic device for monitoring power consumption of an electro-optical displayCITIZEN WATCH CO LTD·Filed 1975·Granted Jan 4, 1977·48 cites·17 claims
- 0683US4150535AElectronic timepieceCITIZEN WATCH CO LTD·Filed 1975·Granted Apr 24, 1979·13 cites·29 claims
- 0782US4229668ATransistor circuit having a plurality of CMOS circuitsCITIZEN WATCH CO LTD·Filed 1978·Granted Oct 21, 1980·18 cites·8 claims
- 0881US4193255AElectronic timepiece with calendar functionCITIZEN WATCH CO LTD·Filed 1978·Granted Mar 18, 1980·18 cites·15 claims
- 0980US4302829AElectronic timepieceCITIZEN WATCH CO LTD·Filed 1978·Granted Nov 24, 1981·11 cites·8 claims
- 1079US4244043AFrequency division systemCITIZEN WATCH CO LTD·Filed 1979·Granted Jan 6, 1981·38 cites·20 claims
- 1177US4746915ADrive circuit for matrix display deviceCITIZEN WATCH CO LTD·Filed 1986·Granted May 24, 1988·37 cites·3 claims
- 1277US4633242ARow conductor scanning drive circuit for matrix display panelCITIZEN WATCH CO LTD·Filed 1983·Granted Dec 30, 1986·31 cites·4 claims
- 1376US4277840AElectronic timepieceCITIZEN WATCH CO LTD·Filed 1978·Granted Jul 7, 1981·15 cites·10 claims
- 1471US4198579AInput circuit for portable electronic devicesCITIZEN WATCH CO LTD·Filed 1977·Granted Apr 15, 1980·12 cites·10 claims
- 1570US4224531AData transfer circuitCITIZEN WATCH CO LTD·Filed 1978·Granted Sep 23, 1980·12 cites·14 claims
- 1669US4148015AElectronic timepiece with an electrochromic displayCITIZEN WATCH CO LTD·Filed 1976·Granted Apr 3, 1979·18 cites·4 claims
- 1769US3961840ADriving circuit for liquid-crystal displayCITIZEN WATCH CO LTD·Filed 1974·Granted Jun 8, 1976·17 cites·8 claims
- 1868US4308607AElectronic timepieceCITIZEN WATCH CO LTD·Filed 1979·Granted Dec 29, 1981·11 cites·8 claims
- 1968US4107915AElectronic timepieceCITIZEN WATCH CO LTD·Filed 1976·Granted Aug 22, 1978·11 cites·5 claims
- 2065US4433918AAnalog display electronic timepiece with multi-mode display capabilityCITIZEN WATCH CO LTD·Filed 1981·Granted Feb 28, 1984·19 cites·7 claims
- 2164US4067187AElectronic timepieceCITIZEN WATCH CO LTD·Filed 1976·Granted Jan 10, 1978·10 cites·12 claims
- 2261US4645303ALiquid crystal matrix display panel drive methodCITIZEN WATCH CO LTD·Filed 1985·Granted Feb 24, 1987·20 cites·6 claims
- 2360US4246602AElectronic timepieceCITIZEN WATCH CO LTD·Filed 1978·Granted Jan 20, 1981·8 cites·5 claims
- 2460US4245338ATime correction system for an electronic timepieceCITIZEN WATCH CO LTD·Filed 1978·Granted Jan 13, 1981·12 cites·12 claims
- 2560US4074256ADriver circuit for driving electrochromic display deviceCITIZEN WATCH CO LTD·Filed 1976·Granted Feb 14, 1978·13 cites·21 claims
- 2658US4292680AElectronic timepieceCITIZEN WATCH CO LTD·Filed 1978·Granted Sep 29, 1981·4 cites·8 claims
- 2758US4237420ATemperature sensing circuitCITIZEN WATCH CO LTD·Filed 1978·Granted Dec 2, 1980·15 cites·3 claims
- 2857US4266278APortable electronic device equipped with calculation and timekeeping functionsCITIZEN WATCH CO LTD·Filed 1979·Granted May 5, 1981·18 cites·6 claims
- 2956US4157588AMiniature type electronic deviceCITIZEN WATCH CO LTD·Filed 1977·Granted Jun 5, 1979·18 cites·9 claims
- 3055US4785297ADriver circuit for matrix type display deviceCITIZEN WATCH CO LTD·Filed 1986·Granted Nov 15, 1988·15 cites·10 claims
- 3154US4011002AElectronic device for detecting the energized state of a liquid crystal display cellCITIZEN WATCH CO LTD·Filed 1975·Granted Mar 8, 1977·6 cites·7 claims
- 3253US4270194AElectronic alarm timepieceCITIZEN WATCH CO LTD·Filed 1978·Granted May 26, 1981·3 cites·24 claims
- 3352US4302828AElectronic timepieceCITIZEN WATCH CO LTD·Filed 1978·Granted Nov 24, 1981·3 cites·2 claims
- 3451US4150365ADriver circuit for electrochromic display deviceCITIZEN WATCH CO LTD·Filed 1976·Granted Apr 17, 1979·6 cites·11 claims
- 3550US4217654APortable electronic device equipped with timekeeping and calculation functionsCITIZEN WATCH CO LTD·Filed 1978·Granted Aug 12, 1980·5 cites·4 claims
- 3647US4475180ANon-volatile memory circuit for portable electronic devicesCITIZEN WATCH CO LTD·Filed 1981·Granted Oct 2, 1984·9 cites·18 claims
- 3747US4257114AElectronic timepieceCITIZEN WATCH CO LTD·Filed 1979·Granted Mar 17, 1981·5 cites·11 claims
- 3847US4142362ADigital display timepieceCITIZEN WATCH CO LTD·Filed 1977·Granted Mar 6, 1979·4 cites·17 claims
- 3946US4240150APortable timepiece calculator with power savings featureCITIZEN WATCH CO LTD·Filed 1978·Granted Dec 16, 1980·11 cites·1 claims
- 4046US4045692ASolid state binary logic signal source for electronic timepiece or the likeMOROKAWA SHIGERU·Filed 1975·Granted Aug 30, 1977·8 cites·3 claims
- 4145US4258431AElectronic timepiece having an analog display device and a digital display deviceCITIZEN WATCH CO LTD·Filed 1978·Granted Mar 24, 1981·4 cites·11 claims
- 4245US4250571APortable electronic deviceCITIZEN WATCH CO LTD·Filed 1978·Granted Feb 10, 1981·4 cites·4 claims
- 4344US4096412ADriver circuit for electrochromic display deviceCITIZEN WATCH CO LTD·Filed 1976·Granted Jun 20, 1978·4 cites·21 claims
- 4443US4060974AMethod and apparatus for driving electrochromic display deviceCITIZEN WATCH CO LTD·Filed 1976·Granted Dec 6, 1977·4 cites·2 claims
- 4540US4262349ASystem for signalling the termination of the lifetime of a battery for electronic timepiecesCITIZEN WATCH CO LTD·Filed 1978·Granted Apr 14, 1981·4 cites·8 claims
- 4636US4306302AElectronic timepieceCITIZEN WATCH CO LTD·Filed 1979·Granted Dec 15, 1981·2 cites·10 claims
- 4736US3979608ASolid state binary logic signal source for electronic timepiece or the likeCITIZEN WATCH CO LTD·Filed 1975·Granted Sep 7, 1976·2 cites·8 claims
- 4834US4433920AElectronic timepiece having improved primary frequency divider response characteristicsCITIZEN WATCH CO LTD·Filed 1981·Granted Feb 28, 1984·3 cites·5 claims
- 4932US4236241AElectronic timepieceCITIZEN WATCH CO LTD·Filed 1978·Granted Nov 25, 1980·0 cites·10 claims
- 5032US4192135APortable electronic deviceCITIZEN WATCH CO LTD·Filed 1977·Granted Mar 11, 1980·1 cites·6 claims
Showing the top 50 of 53 patent records by PatentIndex Score.
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