Granted Patent
Utility
US 4,240,469 · App. 05/958,030
Reversing valve construction and parts therefor and methods of making the same
Inventor:
Werner Bauer
Patented Case
View Patent ↗
Granted: Dec 23, 1980
Filed: Nov 6, 1978
Inventor
Werner Bauer
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.