Assignee
SPECTRA INC
US·70 granted patents·3,277 citations·filing 1987–2003
Top patents by PatentIndex Score
70 records- 0199US5265315AMethod of making a thin-film transducer ink jet headSPECTRA INC·Filed 1990·Granted Nov 30, 1993·312 cites·19 claims
- 0298US4825227AShear mode transducer for ink jet systemsSPECTRA INC·Filed 1988·Granted Apr 25, 1989·188 cites·18 claims
- 0397US5659346ASimplified ink jet headSPECTRA INC·Filed 1994·Granted Aug 19, 1997·84 cites·33 claims
- 0497US4864328ADual mode ink jet printerSPECTRA INC·Filed 1988·Granted Sep 5, 1989·104 cites·23 claims
- 0597US4751528APlaten arrangement for hot melt ink jet apparatusSPECTRA INC·Filed 1987·Granted Jun 14, 1988·158 cites·19 claims
- 0696US4814786AHot melt ink supply systemSPECTRA INC·Filed 1987·Granted Mar 21, 1989·104 cites·23 claims
- 0795US5757400AHigh resolution matrix ink jet arrangementSPECTRA INC·Filed 1996·Granted May 26, 1998·125 cites·18 claims
- 0895US5694156AInk jet head with ink usage sensorSPECTRA INC·Filed 1993·Granted Dec 2, 1997·83 cites·13 claims
- 0995US4951067AControlled ink drop spreading in hot melt ink jet printingSPECTRA INC·Filed 1988·Granted Aug 21, 1990·78 cites·14 claims
- 1095US4937598AInk supply system for an ink jet headSPECTRA INC·Filed 1989·Granted Jun 26, 1990·121 cites·12 claims
- 1194US5605659AMethod for poling a ceramic piezoelectric plateSPECTRA INC·Filed 1995·Granted Feb 25, 1997·79 cites·3 claims
- 1294US4835554AInk jet arraySPECTRA INC·Filed 1987·Granted May 30, 1989·81 cites·11 claims
- 1393US5771052ASingle pass ink jet printer with offset ink jet modulesSPECTRA INC·Filed 1996·Granted Jun 23, 1998·93 cites·14 claims
- 1493US5755909AElectroding of ceramic piezoelectric transducersSPECTRA INC·Filed 1996·Granted May 26, 1998·70 cites·19 claims
- 1593US4788556ADeaeration of ink in an ink jet systemSPECTRA INC·Filed 1987·Granted Nov 29, 1988·63 cites·10 claims
- 1691US5446484AThin-film transducer ink jet headSPECTRA INC·Filed 1993·Granted Aug 29, 1995·60 cites·14 claims
- 1791US4940995ARemoval of dissolved gas from ink in an ink jet systemSPECTRA INC·Filed 1988·Granted Jul 10, 1990·50 cites·10 claims
- 1890US5640184AOrifice plate for simplified ink jet headSPECTRA INC·Filed 1995·Granted Jun 17, 1997·54 cites·2 claims
- 1990US4961082ADeaeration of ink in an ink jet systemSPECTRA INC·Filed 1988·Granted Oct 2, 1990·45 cites·7 claims
- 2090US4891654AInk jet arraySPECTRA INC·Filed 1989·Granted Jan 2, 1990·57 cites·7 claims
- 2189US5757391AHigh-frequency drop-on-demand ink jet systemSPECTRA INC·Filed 1996·Granted May 26, 1998·71 cites·14 claims
- 2289US5500988AMethod of making a perovskite thin-film ink jet transducerSPECTRA INC·Filed 1994·Granted Mar 26, 1996·54 cites·21 claims
- 2389US4947184AElimination of nucleation sites in pressure chamber for ink jet systemsSPECTRA INC·Filed 1989·Granted Aug 7, 1990·49 cites·12 claims
- 2488US5701148ADeaerator for simplified ink jet headSPECTRA INC·Filed 1995·Granted Dec 23, 1997·43 cites·6 claims
- 2588US5075689ABidirectional hot melt ink jet printingSPECTRA INC·Filed 1989·Granted Dec 24, 1991·49 cites·26 claims
- 2687US6450627B1Simplified ink jet headSPECTRA INC·Filed 2001·Granted Sep 17, 2002·27 cites·13 claims
- 2787US5182571AHot melt ink jet transparencySPECTRA INC·Filed 1991·Granted Jan 26, 1993·61 cites·23 claims
- 2887US4928120AOrifice plate cleaner for hot melt ink jetSPECTRA INC·Filed 1988·Granted May 22, 1990·49 cites·20 claims
- 2986US5189438ADual reservoir and valve system for an ink jet headSPECTRA INC·Filed 1991·Granted Feb 23, 1993·61 cites·25 claims
- 3085US5691752APerovskite thin-film ink jet transducerSPECTRA INC·Filed 1995·Granted Nov 25, 1997·46 cites·17 claims
- 3185US4948968AHigh resolution optical encoder having a long detection strokeSPECTRA INC·Filed 1989·Granted Aug 14, 1990·30 cites·15 claims
- 3284US5502467AInk jet printhead with ink viscosity controlSPECTRA INC·Filed 1994·Granted Mar 26, 1996·53 cites·9 claims
- 3383US5043741AControlled ink drop spreading in hot melt ink jet printingSPECTRA INC·Filed 1990·Granted Aug 27, 1991·47 cites·32 claims
- 3483US4995940AMethod for forming a gas removing device for an ink jet systemSPECTRA INC·Filed 1990·Granted Feb 26, 1991·39 cites·7 claims
- 3582US6755511B1Piezoelectric ink jet module with sealSPECTRA INC·Filed 1999·Granted Jun 29, 2004·33 cites·25 claims
- 3682US6575558B1Single-pass inkjet printingSPECTRA INC·Filed 1999·Granted Jun 10, 2003·31 cites·5 claims
- 3781US6037707AElectroding of ceramic piezoelectric transducersSPECTRA INC·Filed 1998·Granted Mar 14, 2000·32 cites·12 claims
- 3881US5557305AInk jet purging arrangementSPECTRA INC·Filed 1994·Granted Sep 17, 1996·41 cites·12 claims
- 3979US6357867B1Single-pass inkjet printingSPECTRA INC·Filed 1999·Granted Mar 19, 2002·37 cites·16 claims
- 4079US5742313AEfficient ink jet head arrangementSPECTRA INC·Filed 1994·Granted Apr 21, 1998·37 cites·15 claims
- 4179US4971408ARemelting of printed hot melt ink imagesSPECTRA INC·Filed 1988·Granted Nov 20, 1990·28 cites·27 claims
- 4278US4801473AMethod for preparing a hot melt ink transparencySPECTRA INC·Filed 1987·Granted Jan 31, 1989·22 cites·21 claims
- 4376US6886924B2Droplet ejection deviceSPECTRA INC·Filed 2002·Granted May 3, 2005·14 cites·32 claims
- 4476US6532028B1Ink jet printer having a ceramic piezoelectric transducerSPECTRA INC·Filed 1998·Granted Mar 11, 2003·25 cites·6 claims
- 4574US6682181B1Ink jet head containing a carbon memberSPECTRA INC·Filed 1995·Granted Jan 27, 2004·21 cites·16 claims
- 4674US5281442ATreatment of hot melt ink imagesSPECTRA INC·Filed 1992·Granted Jan 25, 1994·17 cites·34 claims
- 4773US5202703APiezoelectric transducers for ink jet systemsSPECTRA INC·Filed 1990·Granted Apr 13, 1993·30 cites·20 claims
- 4872US6824253B2Low voltage ink jet printing moduleSPECTRA INC·Filed 2001·Granted Nov 30, 2004·14 cites·17 claims
- 4971US6620237B2Oriented piezoelectric filmSPECTRA INC·Filed 2001·Granted Sep 16, 2003·12 cites·30 claims
- 5071US5023111ATreatment of hot melt ink imagesSPECTRA INC·Filed 1989·Granted Jun 11, 1991·13 cites·19 claims
Showing the top 50 of 70 patent records by PatentIndex Score.
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