Granted Patent
Utility
US 5,646,363 · App. 08/420,305
Free piston machine
Inventor:
Clifford Denchfield
Patented Case
View Patent ↗
Granted: Jul 8, 1997
Filed: Apr 10, 1995
Inventor
Clifford Denchfield
Assignee (at issue)
Loral Europe Limited
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.