Granted Patent
Utility
US 4,819,578 · App. 07/022,187
Toner collecting device
Inventors:
Junichi Koiso, Takayoshi Hashimoto, Toshio Shida
Patented Case
View Patent ↗
Granted: Apr 11, 1989
Filed: Mar 5, 1987
Inventors
Junichi Koiso
Takayoshi Hashimoto
Toshio Shida
Assignee (at issue)
Konishiroku Photo Industry Co., Ltd.
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.