Granted Patent
Utility
US 4,367,964 · App. 06/179,491
Serial impact calculator printer with dual feed and validation mechanism
Inventor:
Dean H. Cranston
Patented Case
View Patent ↗
Granted: Jan 11, 1983
Filed: Aug 19, 1980
Inventor
Dean H. Cranston
Assignee (at issue)
Eaton Corporation
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.