Granted Patent
Utility
US 5,907,755 · App. 09/073,768
Developing device
Inventors:
Yasuo Takuma, Yoshitaka Fujinuma, Masayasu Anzai, Hisao Okada
Patented Case
View Patent ↗
Granted: May 25, 1999
Filed: May 7, 1998
Inventors
Yasuo Takuma
Yoshitaka Fujinuma
Masayasu Anzai
Hisao Okada
Assignee (at issue)
Hitachi Koki 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.