Granted Patent
Utility
US 4,902,617 · App. 07/055,269
Enzyme and process for producing the same
Inventors:
Akiko Fujiwara, Tatsuo Hoshino, Teruhide Sugisawa
Patented Case
View Patent ↗
Granted: Feb 20, 1990
Filed: May 29, 1987
Inventors
Akiko Fujiwara
Tatsuo Hoshino
Teruhide Sugisawa
Assignee (at issue)
HOFFMANN-LA ROCHE 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.