Inventor · disambiguated record
Masanao Matsuzawa
Also filed as: MATSUZAWA MASANAO
26 granted patents·1,077 citations·filing 1981–1999
98Inventor score
Top patents by PatentIndex Score
26 records- 0194US5421658AInk supply mechanism for a dot matrix printerSEIKO EPSON CORP·Filed 1993·Granted Jun 6, 1995·57 cites·69 claims
- 0293US5156472ADot matrix printer supply system having ink absorbing member filled under reduced pressureSEIKO EPSON CORP·Filed 1990·Granted Oct 20, 1992·74 cites·39 claims
- 0393US4969759AInk-supplied wire dot matrix printer headSEIKO EPSON CORP·Filed 1989·Granted Nov 13, 1990·74 cites·8 claims
- 0493US4962391AInk jet printer headSEIKO EPSON CORP·Filed 1989·Granted Oct 9, 1990·82 cites·14 claims
- 0592US5328279ADot matrix printer headSEIKO EPSON CORP·Filed 1992·Granted Jul 12, 1994·52 cites·10 claims
- 0692US5072240AOn-demand type ink jet print headSEIKO EPSON CORP·Filed 1989·Granted Dec 10, 1991·74 cites·36 claims
- 0789US5158377AInk-supply system for a dot matrix printerSEIKO EPSON CORP·Filed 1990·Granted Oct 27, 1992·54 cites·114 claims
- 0888US5221148ADot matrix printer ink supply system having ink absorbing member substantially filling an ink tankSUZUKI TAKASHI·Filed 1990·Granted Jun 22, 1993·65 cites·28 claims
- 0988US5156471AInk-supplied wire dot matrix printer headSEIKO EPSON CORP·Filed 1990·Granted Oct 20, 1992·50 cites·27 claims
- 1087US5156473AMulti-color cartridge ink-supply system for a dot matrix printerSEIKO EPSON CORP·Filed 1990·Granted Oct 20, 1992·59 cites·64 claims
- 1186US5174665AInk-supply system for a dot matrix printerSEIKO EPSON CORP·Filed 1990·Granted Dec 29, 1992·54 cites·46 claims
- 1285US5156470ATwo cartridge ink-supply system for a multi-color dot matrix printerSEIKO EPSON CORP·Filed 1990·Granted Oct 20, 1992·52 cites·66 claims
- 1385US4456393AWire dot printerSUWA SEIKOSHA KK·Filed 1981·Granted Jun 26, 1984·35 cites·67 claims
- 1484US5615957AInk-supply tank for a dot matrix printerSEIKO EPSON CORP·Filed 1995·Granted Apr 1, 1997·28 cites·23 claims
- 1584US5603577AInk supply tank for a printerSEIKO EPSON CORP·Filed 1995·Granted Feb 18, 1997·29 cites·87 claims
- 1684US5560720AInk-supply tank for a dot matrix printerSEIKO EPSON CORP·Filed 1995·Granted Oct 1, 1996·29 cites·82 claims
- 1783US5622439AInk-supply tank for a dot matrix printerSEIKO EPSON CORP·Filed 1995·Granted Apr 22, 1997·26 cites·212 claims
- 1882US4433925AManually-operated dot printer for pocket sized calculatorsEPSON CORP·Filed 1981·Granted Feb 28, 1984·28 cites·4 claims
- 1981US6176629B1Ink supply tank for a printerSEIKO EPSON CORP·Filed 1997·Granted Jan 23, 2001·24 cites·74 claims
- 2080US5607242AInk-supply tank for a printerSEIKO EPSON CORP·Filed 1995·Granted Mar 4, 1997·23 cites·44 claims
- 2180US4553865AInk-supplied wire dot printerEPSON CORP·Filed 1983·Granted Nov 19, 1985·26 cites·12 claims
- 2277US5453770AOn-demand type ink jet print headSEIKO EPSON CORP·Filed 1992·Granted Sep 26, 1995·36 cites·17 claims
- 2373US6123469AInk-supply wire dot matrix printer headSEIKO EPSON CORP·Filed 1994·Granted Sep 26, 2000·14 cites·5 claims
- 2468US4610554AInk composition and wire dot printer including sameSEIKO EPSON CORP·Filed 1984·Granted Sep 9, 1986·18 cites·16 claims
- 2559US6224275B1Ink-supply tank for a printerSEIKO EPSON CORP·Filed 1999·Granted May 1, 2001·8 cites·2 claims
- 2653US6231248B1Ink supply tank for a printerSEIKO EPSON CORP·Filed 1996·Granted May 15, 2001·6 cites·33 claims
Join the waitlist — get patent alerts
Get an alert when Masanao Matsuzawa 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 →