Assignee
SPECTRA INC
US70 patents
Top patents by PatentIndex Score
US5265315ANov 30, 1993
Method of making a thin-film transducer ink jet head
SPECTRA INC312 citations99
US4825227AApr 25, 1989
Shear mode transducer for ink jet systems
SPECTRA INC188 citations99
US5757400AMay 26, 1998
High resolution matrix ink jet arrangement
SPECTRA INC125 citations98
US4751528AJun 14, 1988
Platen arrangement for hot melt ink jet apparatus
SPECTRA INC158 citations98
US5659346AAug 19, 1997
Simplified ink jet head
SPECTRA INC84 citations97
US5771052AJun 23, 1998
Single pass ink jet printer with offset ink jet modules
SPECTRA INC93 citations96
US5757391AMay 26, 1998
High-frequency drop-on-demand ink jet system
SPECTRA INC71 citations96
US5755909AMay 26, 1998
Electroding of ceramic piezoelectric transducers
SPECTRA INC70 citations96
US5694156ADec 2, 1997
Ink jet head with ink usage sensor
SPECTRA INC83 citations96
US5691752ANov 25, 1997
Perovskite thin-film ink jet transducer
SPECTRA INC46 citations96
US5500988AMar 26, 1996
Method of making a perovskite thin-film ink jet transducer
SPECTRA INC54 citations96
US5446484AAug 29, 1995
Thin-film transducer ink jet head
SPECTRA INC60 citations96
US4961082AOct 2, 1990
Deaeration of ink in an ink jet system
SPECTRA INC45 citations96
US4951067AAug 21, 1990
Controlled ink drop spreading in hot melt ink jet printing
SPECTRA INC78 citations96
US4891654AJan 2, 1990
Ink jet array
SPECTRA INC57 citations96
US4864328ASep 5, 1989
Dual mode ink jet printer
SPECTRA INC104 citations96
US4835554AMay 30, 1989
Ink jet array
SPECTRA INC81 citations96
US4814786AMar 21, 1989
Hot melt ink supply system
SPECTRA INC104 citations96
US4788556ANov 29, 1988
Deaeration of ink in an ink jet system
SPECTRA INC63 citations96
US6755511B1Jun 29, 2004
Piezoelectric ink jet module with seal
SPECTRA INC33 citations95
US5640184AJun 17, 1997
Orifice plate for simplified ink jet head
SPECTRA INC54 citations95
US5605659AFeb 25, 1997
Method for poling a ceramic piezoelectric plate
SPECTRA INC79 citations95
US5189438AFeb 23, 1993
Dual reservoir and valve system for an ink jet head
SPECTRA INC61 citations95
US5182571AJan 26, 1993
Hot melt ink jet transparency
SPECTRA INC61 citations95
US6575558B1Jun 10, 2003
Single-pass inkjet printing
SPECTRA INC31 citations93
US5502467AMar 26, 1996
Ink jet printhead with ink viscosity control
SPECTRA INC53 citations93
US4937598AJun 26, 1990
Ink supply system for an ink jet head
SPECTRA INC121 citations93
US6532028B1Mar 11, 2003
Ink jet printer having a ceramic piezoelectric transducer
SPECTRA INC25 citations92
US6450627B1Sep 17, 2002
Simplified ink jet head
SPECTRA INC27 citations92
US6037707AMar 14, 2000
Electroding of ceramic piezoelectric transducers
SPECTRA INC32 citations92
US5742313AApr 21, 1998
Efficient ink jet head arrangement
SPECTRA INC37 citations92
US5557305ASep 17, 1996
Ink jet purging arrangement
SPECTRA INC41 citations92
US5202703AApr 13, 1993
Piezoelectric transducers for ink jet systems
SPECTRA INC30 citations92
US5075689ADec 24, 1991
Bidirectional hot melt ink jet printing
SPECTRA INC49 citations92
US5043741AAug 27, 1991
Controlled ink drop spreading in hot melt ink jet printing
SPECTRA INC47 citations92
US4995940AFeb 26, 1991
Method for forming a gas removing device for an ink jet system
SPECTRA INC39 citations92
US4971408ANov 20, 1990
Remelting of printed hot melt ink images
SPECTRA INC28 citations92
US4948968AAug 14, 1990
High resolution optical encoder having a long detection stroke
SPECTRA INC30 citations92
US4947184AAug 7, 1990
Elimination of nucleation sites in pressure chamber for ink jet systems
SPECTRA INC49 citations92
US4940995AJul 10, 1990
Removal of dissolved gas from ink in an ink jet system
SPECTRA INC50 citations92
US6682181B1Jan 27, 2004
Ink jet head containing a carbon member
SPECTRA INC21 citations91
US5701148ADec 23, 1997
Deaerator for simplified ink jet head
SPECTRA INC43 citations91
US6357867B1Mar 19, 2002
Single-pass inkjet printing
SPECTRA INC37 citations90
US4928120AMay 22, 1990
Orifice plate cleaner for hot melt ink jet
SPECTRA INC49 citations90
US5209181AMay 11, 1993
Surgical tube painting machine
SPECTRA INC24 citations87
US6886924B2May 3, 2005
Droplet ejection device
SPECTRA INC14 citations84
US6824253B2Nov 30, 2004
Low voltage ink jet printing module
SPECTRA INC14 citations84
US5281442AJan 25, 1994
Treatment of hot melt ink images
SPECTRA INC17 citations81
US4873134AOct 10, 1989
Hot melt ink projection transparency
SPECTRA INC23 citations81
US4801473AJan 31, 1989
Method for preparing a hot melt ink transparency
SPECTRA INC22 citations80
Showing the top 50 of 70 patents by PatentIndex Score.