Granted Patent
Utility
US 5,152,456 · App. 07/620,416
Dispensing apparatus having a perforate outlet member and a vibrating device
Inventors:
Calvin Ross, Victor C. Humberstone
Patented Case
View Patent ↗
Granted: Oct 6, 1992
Filed: Dec 3, 1990
Inventors
Calvin Ross
Victor C. Humberstone
Assignee (at issue)
Bespak plc
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.