Inventor · disambiguated record
Masao Sunagawa
Also filed as: SUNAGAWA MASAO
15 granted patents·500 citations·filing 1982–2000
95Inventor score
Files withHITACHI LTD15
Top patents by PatentIndex Score
15 records- 0194US4446594AUpright type electric cleanerHITACHI LTD·Filed 1982·Granted May 8, 1984·91 cites·5 claims
- 0289US5159738AVacuum cleaner having silencer mechanismHITACHI LTD·Filed 1992·Granted Nov 3, 1992·90 cites·17 claims
- 0387USD293728SVacuum cleanerHITACHI LTD·Filed 1985·Granted Jan 12, 1988·30 cites·1 claims
- 0484US4809394AVacuum cleaner having a blower facility structureHITACHI LTD·Filed 1987·Granted Mar 7, 1989·54 cites·9 claims
- 0577US5216778AVacuum cleanerHITACHI LTD·Filed 1992·Granted Jun 8, 1993·48 cites·12 claims
- 0674US6282749B1Vacuum cleaner and suction nozzle body thereof cross reference to related applicationHITACHI LTD·Filed 2000·Granted Sep 4, 2001·25 cites·16 claims
- 0772US4905341AUpright-type electric vacuum cleanerHITACHI LTD·Filed 1986·Granted Mar 6, 1990·31 cites·9 claims
- 0868US5365633AVacuum cleanerHITACHI LTD·Filed 1991·Granted Nov 22, 1994·35 cites·16 claims
- 0960US6212732B1Vacuum cleaner and suction nozzle body thereforHITACHI LTD·Filed 1995·Granted Apr 10, 2001·30 cites·21 claims
- 1057US5003663AUpright-type electric vacuum cleanerHITACHI LTD·Filed 1988·Granted Apr 2, 1991·22 cites·2 claims
- 1152USD312901SElectric vacuum cleanerHITACHI LTD·Filed 1989·Granted Dec 11, 1990·6 cites·1 claims
- 1251US4955105AVacuum cleanerHITACHI LTD·Filed 1988·Granted Sep 11, 1990·20 cites·30 claims
- 1345US4893376AUpright-type electric vacuum cleanerHITACHI LTD·Filed 1988·Granted Jan 16, 1990·11 cites·2 claims
- 1434USD302878SElectric vacuum cleanerHITACHI LTD·Filed 1987·Granted Aug 15, 1989·1 cites·1 claims
- 1531US5131114AVacuum cleanerHITACHI LTD·Filed 1990·Granted Jul 21, 1992·6 cites·5 claims
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