Granted Patent
Utility
US 4,559,305 · App. 06/270,013
Microbial culture system
Inventors:
James E. Zajic, Martha A. Hill, Donald F. Manchester, Karel Muzika
Patented Case
View Patent ↗
Granted: Dec 17, 1985
Filed: Jun 3, 1981
Inventors
James E. Zajic
Martha A. Hill
Donald F. Manchester
Karel Muzika
Assignee (at issue)
Abitibi Paper Company 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.