Granted Patent
Utility
US 5,331,432 · App. 08/042,598
Image forming apparatus
Inventors:
Kouichi Sawada, Hiroyuki Yamamoto, Yoshiyuki Ichihara
Patented Case
View Patent ↗
Granted: Jul 19, 1994
Filed: Apr 2, 1993
Inventors
Kouichi Sawada
Hiroyuki Yamamoto
Yoshiyuki Ichihara
Assignee (at issue)
Konica Corporation
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.