Granted Patent
Utility
US 4,855,559 · App. 07/253,159
Adjustable heater collet
Inventor:
Joseph E. Donner
Patented Case
View Patent ↗
Granted: Aug 8, 1989
Filed: Oct 4, 1988
Inventor
Joseph E. Donner
Assignee (at issue)
Hughes Aircraft Company
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.