Granted Patent
Utility
US 4,441,317 · App. 06/321,550
Piston and cylinder type thermal device part therefor and methods of making the same
Inventors:
Denis G. Wolfe, Naohisa WADA
Patented Case
View Patent ↗
Granted: Apr 10, 1984
Filed: Nov 16, 1981
Inventors
Denis G. Wolfe
Naohisa WADA
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.