Granted Patent
Utility
US 4,628,842 · App. 06/841,313
Device for preventing fall of button parts from a chute
Inventor:
Yukio Taga
Patented Case
View Patent ↗
Granted: Dec 16, 1986
Filed: Mar 19, 1986
Inventor
Yukio Taga
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.