Granted Patent
Utility
US 4,214,540 · App. 06/043,779
Variable presser bar pressure control arrangement
Inventor:
Albert N. Cook
Patented Case
View Patent ↗
Granted: Jul 29, 1980
Filed: May 30, 1979
Inventor
Albert N. Cook
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.