Granted Patent
Utility
US 4,335,750 · App. 06/149,031
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: Jun 22, 1982
Filed: May 12, 1980
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.