Granted Patent
Utility
US 4,714,037 · App. 06/292,071
Needle looper assembly for non-threaded needle lockstitching
Inventors:
Ralph E. Johnson, Donald Rodda
Patented Case
View Patent ↗
Granted: Dec 22, 1987
Filed: Aug 12, 1981
Inventors
Ralph E. Johnson
Donald Rodda
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.