Granted Patent
Utility
US 4,917,656 · App. 07/380,952
Rear belt guard in a sewing machine
Inventors:
Shuichi Sato, Takashi Sakai
Patented Case
View Patent ↗
Granted: Apr 17, 1990
Filed: Jul 17, 1989
Inventors
Shuichi Sato
Takashi Sakai
Assignee (at issue)
SSMC Inc.
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.