Granted Patent
Utility
US 4,245,670 · App. 05/958,029
Reversing valve construction and piston head assembly therefor and methods of making the same
Inventors:
Werner Bauer, Robert A. Van Fossen
Patented Case
View Patent ↗
Granted: Jan 20, 1981
Filed: Nov 6, 1978
Inventors
Werner Bauer
Robert A. Van Fossen
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.