Granted Patent
Utility
US 6,571,680 · App. 09/841,680
Pneumatic shift reciprocating pneumatic motor
Inventor:
Richard K. Gardner
Patented Case
View Patent ↗
Granted: Jun 3, 2003
Filed: Apr 24, 2001
Inventor
Richard K. Gardner
Assignee (at issue)
Ingersoll-Rand 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.