Granted Patent
Utility
US 5,212,863 · App. 07/871,728
Method for forming element-free spaces in slide fastener chain
Inventor:
Masao Matsumoto
Patented Case
View Patent ↗
Granted: May 25, 1993
Filed: Apr 21, 1992
Inventor
Masao Matsumoto
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.