Inventor
HESS ULRICH E
US14 patents
⚠️ This page may combine multiple inventors who share the name “HESS ULRICH E”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HEWLETT PACKARD CO
10 patentsUS4719477AJan 12, 1988
Integrated thermal ink jet printhead and method of manufacture
HEWLETT PACKARD CO223 citations98
US5635968AJun 3, 1997
Thermal inkjet printer printhead with offset heater resistors
HEWLETT PACKARD CO171 citations97
US5122812AJun 16, 1992
Thermal inkjet printhead having driver circuitry thereon and method for making the same
HEWLETT PACKARD CO141 citations96
US5635966AJun 3, 1997
Edge feed ink delivery thermal inkjet printhead structure and method of fabrication
HEWLETT PACKARD CO91 citations94
US5159353AOct 27, 1992
Thermal inkjet printhead structure and method for making the same
HEWLETT PACKARD CO116 citations94
US6273555B1Aug 14, 2001
High efficiency ink delivery printhead having improved thermal characteristics
HEWLETT PACKARD CO23 citations92
US6209991B1Apr 3, 2001
Transition metal carbide films for applications in ink jet printheads
HEWLETT PACKARD CO25 citations92
US5598189AJan 28, 1997
Bipolar integrated ink jet printhead driver
HEWLETT PACKARD CO39 citations92
US5808640ASep 15, 1998
Special geometry ink jet resistor for high dpi/high frequency structures
HEWLETT PACKARD CO32 citations89
US5681764AOct 28, 1997
Method for forming a bipolar integrated ink jet printhead driver
HEWLETT PACKARD CO12 citations73
HEWLETT PACKARD DEVELOPMENT CO
4 patentsUS7025894B2Apr 11, 2006
Fluid-ejection devices and a deposition method for layers thereof
HEWLETT PACKARD DEVELOPMENT CO18 citations91
US6626523B2Sep 30, 2003
Printhead having a thin film membrane with a floating section
HEWLETT PACKARD DEVELOPMENT CO5 citations73
US6974548B2Dec 13, 2005
Printhead having a thin film membrane with a floating section
HEWLETT PACKARD DEVELOPMENT CO5 citations62
US7517060B2Apr 14, 2009
Fluid-ejection devices and a deposition method for layers thereof
HEWLETT PACKARD DEVELOPMENT CO5 citations61