Granted Patent
Utility
US 4,264,895 · App. 06/016,824
Multi-stage switching network controlled by at least three logical inputs
Inventors:
Takuji Mukaemachi, Tetsuo Takeshita, Keiichi Shimizu, Ryoichi Himeno
Patented Case
View Patent ↗
Granted: Apr 28, 1981
Filed: Mar 2, 1979
Inventors
Takuji Mukaemachi
Tetsuo Takeshita
Keiichi Shimizu
Ryoichi Himeno
Assignees (at issue)
Nippon Telegraph and Telephone Public Corporation
HITACHI, 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.