Inventor · disambiguated record
Takefumi Hatanaka
Also filed as: HATANAKA TAKEFUMI
26 granted patents·5 pending applications·664 citations·filing 1977–2007
97Inventor score
Files withHATANAKA TAKEFUMI8AREX DENSHI KOGYO KK7LIFEWELL CORP5ELSON CORP2INT PATENT TRANSACTIONS COMPAN1
Top patents by PatentIndex Score
31 records- 0198US4192467ADocument shredderHATANAKA TAKEFUMI·Filed 1978·Granted Mar 11, 1980·107 cites·3 claims
- 0294USD265909SPaper shredder or the likeLIFEWELL CORP·Filed 1980·Granted Aug 24, 1982·39 cites·1 claims
- 0388US6202782B1Vehicle driving method and hybrid vehicle propulsion systemFiled 1999·Granted Mar 20, 2001·88 cites·17 claims
- 0488US4231530AAutomatic document shredderHATANAKA TAKEFUMI·Filed 1978·Granted Nov 4, 1980·30 cites·7 claims
- 0588US4124169ADocument shredderHATANAKA TAKEFUMI·Filed 1977·Granted Nov 7, 1978·26 cites·7 claims
- 0678US4690340AWaste material shredderHATANAKA TAKEFUMI·Filed 1986·Granted Sep 1, 1987·33 cites·8 claims
- 0777US6089024ASteam-augmented gas turbineELSON CORP·Filed 1998·Granted Jul 18, 2000·62 cites·14 claims
- 0876US4257565ADesk-top shredderLIFEWELL CORP·Filed 1978·Granted Mar 24, 1981·23 cites·6 claims
- 0975USD265910SPaper shredder or the likeLIFEWELL CORP·Filed 1980·Granted Aug 24, 1982·13 cites·1 claims
- 1075US4260115ADocument shredderLIFEWELL CORP·Filed 1978·Granted Apr 7, 1981·25 cites·3 claims
- 1171US5500581AHigh-efficiency power supply control apparatus for variable-speed induction motorAREX DENSHI KOGYO KK·Filed 1994·Granted Mar 19, 1996·31 cites·18 claims
- 1262US5442271AInduction motor control apparatus providing high efficiency with rapid response to changes in load torqueAREX DENSHI KOGYO KK·Filed 1994·Granted Aug 15, 1995·23 cites·7 claims
- 1362US5241256AMethod and apparatus for controlling the supply of power to an induction motor to maintain high efficiency under varying load conditionsAREX DENSHI KOGYO KK·Filed 1992·Granted Aug 31, 1993·40 cites·4 claims
- 1456USD297240SCutter disk for paper shredding machineHATANAKA TAKEFUMI·Filed 1985·Granted Aug 16, 1988·7 cites·1 claims
- 1555US4844366AWaste material shredderHATANAKA TAKEFUMI·Filed 1988·Granted Jul 4, 1989·9 cites·5 claims
- 1653US6308513B1Turbine and gas turbineFiled 1999·Granted Oct 30, 2001·25 cites·15 claims
- 1753US5204606AInduction motor control apparatusAREX DENSHI KOGYO KK·Filed 1991·Granted Apr 20, 1993·28 cites·7 claims
- 1853USD292590SPaper shredder cutter discHATANAKA TAKEFUMI·Filed 1985·Granted Nov 3, 1987·6 cites·1 claims
- 1951US4914375ASaturable reactor apparatus for automatic control of power factor of inductive loadAREX DENSHI KOGYO KK·Filed 1989·Granted Apr 3, 1990·21 cites·4 claims
- 2049USD265911SPaper shredder or the likeLIFEWELL CORP·Filed 1980·Granted Aug 24, 1982·4 cites·1 claims
- 2148US4111587ATool holderINT PATENT TRANSACTIONS COMPAN·Filed 1977·Granted Sep 5, 1978·10 cites·5 claims
- 2247US2008318883A1Anti-aging supplementELSON CORP·Filed 2007·Application pending·0 cites
- 2345US4776525AWaste material shredderHATANAKA TAKEFUMI·Filed 1987·Granted Oct 11, 1988·6 cites·9 claims
- 2442US2002100215A1Method and system for producing hydrogen from solid carbon and waterFiled 2002·Application pending·0 cites
- 2542US2002103407A1Substitute natural gas production system and related methodFiled 2002·Application pending·0 cites
- 2638US6425737B1TurbineFiled 2000·Granted Jul 30, 2002·3 cites·6 claims
- 2737US2002103405A1Method and system for producing heavier hydrocarbons from solid carbon and waterFiled 2002·Application pending·0 cites
- 2834USD319065SCutter disc for a paper shredderAREX DENSHI KOGYO KK·Filed 1988·Granted Aug 13, 1991·1 cites·1 claims
- 2934USD319064SCutter disc for a paper shredderAREX DENSHI KOGYO KK·Filed 1988·Granted Aug 13, 1991·1 cites·1 claims
- 3034US2002104697A1Hydrogen engine, power drive system and vehicle driven therebyFiled 2002·Application pending·0 cites
- 3132US5694773AClosed cycle gas turbine engine and mechanical system driven therebyFiled 1994·Granted Dec 9, 1997·3 cites·8 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →