Granted Patent
Utility
US 4,684,213 · App. 06/609,889
Submarine optical fiber cable with dam means
Inventors:
Koushi Ishihara, Yasuji Murakami, Nobuyuki Yoshizawa, Kiyoshi Funaki
Patented Case
View Patent ↗
Granted: Aug 4, 1987
Filed: May 14, 1984
Inventors
Koushi Ishihara
Yasuji Murakami
Nobuyuki Yoshizawa
Kiyoshi Funaki
Assignees (at issue)
Nippon Telegraph and Telephone Public Corporation
Ocean Cable 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.