IP Library › Granted Patent US 3,999,968
Granted Patent Utility
US 3,999,968 · App. 05/650,173

Dust collector

Inventor: Roger S. Brookman
Patented Case View Patent ↗
Granted: Dec 28, 1976 Filed: Jan 19, 1976
Inventor
Roger S. Brookman
Assignee (at issue)
American Precision Industries, 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.

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Quick Facts
Patent No.
US 3,999,968
App. No.
05/650,173
Filed
1976-01-19
Granted
1976-12-28
Kind
A