Granted Patent
Utility
US 4,304,869 · App. 06/153,136
Apparatus for rupturing a sealed, frangible container
Inventor:
Denis G. Dyke
Patented Case
View Patent ↗
Granted: Dec 8, 1981
Filed: May 27, 1980
Inventor
Denis G. Dyke
Assignee (at issue)
American Sterilizer Company
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.