Granted Patent
Utility
US 4,246,594 · App. 05/883,796
Low crosstalk type switching matrix of monolithic semiconductor device
Inventor:
Masamichi Mori
Patented Case
View Patent ↗
Granted: Jan 20, 1981
Filed: Mar 6, 1978
Inventor
Masamichi Mori
Assignee (at issue)
Nippon Telegraph and Telephone Public 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.