Granted Patent
Utility
US 4,502,143 · App. 06/369,838
Consecutive identical digit suppression system in a digital communication system
Inventors:
Masami Kato, Noriaki Yoshikai
Patented Case
View Patent ↗
Granted: Feb 26, 1985
Filed: Apr 19, 1982
Inventors
Masami Kato
Noriaki Yoshikai
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.