Granted Patent
Utility
US 4,411,111 · App. 06/201,696
Window sash assembly
Inventor:
Shuichi Hosooka
Patented Case
View Patent ↗
Granted: Oct 25, 1983
Filed: Oct 29, 1980
Inventor
Shuichi Hosooka
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.