Granted Patent
Utility
US 4,653,932 · App. 06/796,903
Digital clock construction, pinion gear therefor and methods of making the same
Inventor:
Alfred A. Frankenberg
Patented Case
View Patent ↗
Granted: Mar 31, 1987
Filed: Nov 12, 1985
Inventor
Alfred A. Frankenberg
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.