Granted Patent
Utility
US 4,422,810 · App. 05/971,344
Apparatus for transporting pneumatically suspended particulates from a source to a plurality of receivers
Inventor:
Douglas J. Boring
Patented Case
View Patent ↗
Granted: Dec 27, 1983
Filed: Dec 20, 1978
Inventor
Douglas J. Boring
Assignee (at issue)
CONAIR LLC
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.