Granted Patent
Utility
US 4,851,097 · App. 07/138,360
Apparatus for repairing a pattern film
Inventors:
Osamu Hattori, Anton Yasaka, Yoshitomo Nakagawa, Mitsuyoshi Sato, Sumio Sasaki
Patented Case
View Patent ↗
Granted: Jul 25, 1989
Filed: Dec 24, 1987
Inventors
Osamu Hattori
Anton Yasaka
Yoshitomo Nakagawa
Mitsuyoshi Sato
Sumio Sasaki
Assignee (at issue)
SEIKO INSTRUMENTS INC.
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.