Assignee
IWATSU ELECTRIC CO LTD
US·220 granted patents·3 pending applications·3,016 citations·filing 1974–2009
Top patents by PatentIndex Score
223 records- 0191US4371808AOne-gun two-beam cathode ray tubeIWATSU ELECTRIC CO LTD·Filed 1980·Granted Feb 1, 1983·74 cites·5 claims
- 0288US5966297ALarge bandwidth analog isolation circuitIWATSU ELECTRIC CO LTD·Filed 1998·Granted Oct 12, 1999·82 cites·14 claims
- 0388US4907792ASheet guide adjusting apparatusIWATSU ELECTRIC CO LTD·Filed 1988·Granted Mar 13, 1990·46 cites·6 claims
- 0488USD287489SHandset and stand telephone unitIWATSU ELECTRIC CO LTD·Filed 1984·Granted Dec 30, 1986·23 cites·1 claims
- 0587USD294023SCombined telephone stand and handsetIWATSU ELECTRIC CO LTD·Filed 1986·Granted Feb 2, 1988·25 cites·1 claims
- 0687US4352550ACombination of circular/straight line light beam scan transforming apparatus and optical device and method of fabricating circular/straight line transforming deviceIWATSU ELECTRIC CO LTD·Filed 1980·Granted Oct 5, 1982·30 cites·60 claims
- 0786US5144838ADefect detecting method and apparatusIWATSU ELECTRIC CO LTD·Filed 1991·Granted Sep 8, 1992·54 cites·9 claims
- 0885US4751497ADigital to analog converter with high output complianceIWATSU ELECTRIC CO LTD·Filed 1986·Granted Jun 14, 1988·70 cites·7 claims
- 0985USD265087STelephone unitIWATSU ELECTRIC CO LTD·Filed 1979·Granted Jun 22, 1982·19 cites·1 claims
- 1085US4072957ANon-impact printing system with magnetic recording apparatus and methodIWATSU ELECTRIC CO LTD·Filed 1976·Granted Feb 7, 1978·27 cites·8 claims
- 1184USD576146STelephoneIWATSU ELECTRIC CO LTD·Filed 2007·Granted Sep 2, 2008·32 cites·1 claims
- 1284USD287361SHandset and stand telephone unitIWATSU ELECTRIC CO LTD·Filed 1984·Granted Dec 23, 1986·19 cites·1 claims
- 1384US4583214AKey telephone transmission systemIWATSU ELECTRIC CO LTD·Filed 1984·Granted Apr 15, 1986·51 cites·2 claims
- 1484US4567465AMethod and apparatus for converting analog signal into digital signalIWATSU ELECTRIC CO LTD·Filed 1983·Granted Jan 28, 1986·37 cites·16 claims
- 1583US5095531AMobile communication position registering method and system thereforIWATSU ELECTRIC CO LTD·Filed 1988·Granted Mar 10, 1992·135 cites·19 claims
- 1683US4667166ADifferential amplifier systemIWATSU ELECTRIC CO LTD·Filed 1986·Granted May 19, 1987·30 cites·5 claims
- 1782USD575263STelephoneIWATSU ELECTRIC CO LTD·Filed 2007·Granted Aug 19, 2008·29 cites·1 claims
- 1882USD451486STelephoneIWATSU ELECTRIC CO LTD·Filed 2000·Granted Dec 4, 2001·26 cites·1 claims
- 1981US4568873AEasy-to-assemble capacitive probe for a high precision dimensional or distance gageIWATSU ELECTRIC CO LTD·Filed 1983·Granted Feb 4, 1986·52 cites·12 claims
- 2081US4215288AStorage target for scan converter tubesIWATSU ELECTRIC CO LTD·Filed 1978·Granted Jul 29, 1980·21 cites·1 claims
- 2180US4491802AWide-band amplifier systemIWATSU ELECTRIC CO LTD·Filed 1982·Granted Jan 1, 1985·26 cites·9 claims
- 2279US4805165ATime division multiplex data transmission method and apparatusIWATSU ELECTRIC CO LTD·Filed 1987·Granted Feb 14, 1989·54 cites·11 claims
- 2378US7424661B2Packet transmission system in wireless LANIWATSU ELECTRIC CO LTD·Filed 2005·Granted Sep 9, 2008·9 cites·25 claims
- 2478US4775840ANoise removing circuitIWATSU ELECTRIC CO LTD·Filed 1986·Granted Oct 4, 1988·47 cites·4 claims
- 2577USD557676SConference telephoneIWATSU ELECTRIC CO LTD·Filed 2006·Granted Dec 18, 2007·30 cites·1 claims
- 2677USD312459STelephone setIWATSU ELECTRIC CO LTD·Filed 1989·Granted Nov 27, 1990·21 cites·1 claims
- 2777US4399512AWaveform searching systemIWATSU ELECTRIC CO LTD·Filed 1980·Granted Aug 16, 1983·38 cites·2 claims
- 2877US3998333ACarrier for processing semiconductor materialsIWATSU ELECTRIC CO LTD·Filed 1975·Granted Dec 21, 1976·24 cites·4 claims
- 2977US3943460AFrequency conversion systemIWATSU ELECTRIC CO LTD·Filed 1974·Granted Mar 9, 1976·20 cites·3 claims
- 3076US5280521APortable telephone systemIWATSU ELECTRIC CO LTD·Filed 1992·Granted Jan 18, 1994·75 cites·6 claims
- 3176US4730128ABias circuit for an avalanche photodiodeIWATSU ELECTRIC CO LTD·Filed 1986·Granted Mar 8, 1988·42 cites·4 claims
- 3276USD281422STelephone unitIWATSU ELECTRIC CO LTD·Filed 1982·Granted Nov 19, 1985·16 cites·1 claims
- 3375USD294022SCombined telephone stand and handsetIWATSU ELECTRIC CO LTD·Filed 1986·Granted Feb 2, 1988·15 cites·1 claims
- 3474USD575262STelephoneIWATSU ELECTRIC CO LTD·Filed 2007·Granted Aug 19, 2008·20 cites·1 claims
- 3574USD529894STelephone setIWATSU ELECTRIC CO LTD·Filed 2004·Granted Oct 10, 2006·24 cites·1 claims
- 3674US4364036AComposite logic analyzer capable of data display in two time-related formatsIWATSU ELECTRIC CO LTD·Filed 1980·Granted Dec 14, 1982·28 cites·9 claims
- 3773USD515063STelephone setIWATSU ELECTRIC CO LTD·Filed 2004·Granted Feb 14, 2006·23 cites·1 claims
- 3873US6546041B1Radio transmission method and apparatus for digital informationIWATSU ELECTRIC CO LTD·Filed 2000·Granted Apr 8, 2003·16 cites·3 claims
- 3973US5448339AControl system for heat fixing apparatusIWATSU ELECTRIC CO LTD·Filed 1993·Granted Sep 5, 1995·26 cites·4 claims
- 4073US4730306AConference systemIWATSU ELECTRIC CO LTD·Filed 1985·Granted Mar 8, 1988·47 cites·1 claims
- 4172US6515518B1Analog switch circuitIWATSU ELECTRIC CO LTD·Filed 2000·Granted Feb 4, 2003·18 cites·8 claims
- 4272USD307145STelephone unitIWATSU ELECTRIC CO LTD·Filed 1988·Granted Apr 10, 1990·13 cites·1 claims
- 4372US4384783AFixing device for wet-type electrophotographic copying machinesIWATSU ELECTRIC CO LTD·Filed 1981·Granted May 24, 1983·20 cites·11 claims
- 4471US5329331APost-processing apparatus with solution's temperature detectorIWATSU ELECTRIC CO LTD·Filed 1993·Granted Jul 12, 1994·9 cites·4 claims
- 4570US5548638AAudio teleconferencing apparatusIWATSU ELECTRIC CO LTD·Filed 1995·Granted Aug 20, 1996·83 cites·9 claims
- 4669US5210786APortable telephone system using stratified exchange systemIWATSU ELECTRIC CO LTD·Filed 1991·Granted May 11, 1993·57 cites·2 claims
- 4768US8385455B2Multi-antenna wireless communication method, multi-antenna wireless communication system, and multi-antenna wireless communication deviceIWATSU ELECTRIC CO LTD·Filed 2009·Granted Feb 26, 2013·4 cites·20 claims
- 4868USD285069STelephone unitIWATSU ELECTRIC CO LTD·Filed 1983·Granted Aug 12, 1986·12 cites·1 claims
- 4967US5571966AMethod and apparatus for predicting lifetime of measured objectIWATSU ELECTRIC CO LTD·Filed 1994·Granted Nov 5, 1996·29 cites·7 claims
- 5067USD280720STelephone unitIWATSU ELECTRIC CO LTD·Filed 1982·Granted Sep 24, 1985·10 cites·1 claims
Showing the top 50 of 223 patent records by PatentIndex Score.
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