Granted Patent
Utility
US 4,751,948 · App. 06/792,791
Method and apparatus for the accurate delivery of powders
Inventors:
John C. Hertig, Trevor Dawson
Patented Case
View Patent ↗
Granted: Jun 21, 1988
Filed: Oct 30, 1985
Inventors
John C. Hertig
Trevor Dawson
Assignee (at issue)
Kendall McGaw Laboratories, 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.