Granted Patent
Utility
US 5,261,601 · App. 07/907,519
Liquid dispensing apparatus having a vibrating perforate membrane
Inventors:
Calvin Ross, Victor C. Humberstone
Patented Case
View Patent ↗
Granted: Nov 16, 1993
Filed: Jul 6, 1992
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.