Granted Patent
Utility
US 5,216,796 · App. 07/871,732
Method and apparatus for shortening size of slide fastener
Inventors:
Shigeru Tanaka, Toshiaki Sawada
Patented Case
View Patent ↗
Granted: Jun 8, 1993
Filed: Apr 21, 1992
Inventors
Shigeru Tanaka
Toshiaki Sawada
Assignee (at issue)
Yoshida Kogyo K.K.
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.