Granted Patent
Utility
US 4,314,532 · App. 06/160,372
Method and apparatus for translating frequency of mechanical movement into a pneumatic signal
Inventor:
Frank Payne
Patented Case
View Patent ↗
Granted: Feb 9, 1982
Filed: Jun 17, 1980
Inventor
Frank Payne
Assignee (at issue)
ROBERTSHAW CONTROLS PRIVATE 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.