Granted Patent
Utility
US 4,630,557 · App. 06/263,623
Adjustable low inertia presser bar
Inventor:
Angus R. T. Russell
Patented Case
View Patent ↗
Granted: Dec 23, 1986
Filed: May 14, 1981
Inventor
Angus R. T. Russell
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.