Granted Patent
Utility
US 4,234,893 · App. 05/945,462
Image drift correction apparatus
Inventor:
David L. Peters
Patented Case
View Patent ↗
Granted: Nov 18, 1980
Filed: Sep 25, 1978
Inventor
David L. Peters
Assignee (at issue)
The Singer Company 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.