Granted Patent
Utility
US 5,223,822 · App. 07/874,073
Valve position indicator
Inventors:
Wallace F. Stommes, Gerald J. Nelson, Gerald A. Cuhel, Ross Kunz
Patented Case
View Patent ↗
Granted: Jun 29, 1993
Filed: Apr 24, 1992
Inventors
Wallace F. Stommes
Gerald J. Nelson
Gerald A. Cuhel
Ross Kunz
Assignee (at issue)
STONEL 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.