Granted Patent
Utility
US 5,622,897 · App. 08/272,145
Process of manufacturing a drop-on-demand ink jet printhead having thermoelectric temperature control means
Inventor:
Donald J. Hayes
Patented Case
View Patent ↗
Granted: Apr 22, 1997
Filed: Jul 8, 1994
Inventor
Donald J. Hayes
Assignee (at issue)
Compaq Computer Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.