Blueprint (copy)
On this date in 1968 Rufus Stokes patented an Exhaust Purifier.
This African American inventor filed for the patent #3,378,241 two years earlier.
At the time he was working at working at R.S. Engineering Company, Inc., Chicago, Ill.
Created Equal The Lives and Ideas of Black American Innovators
By James Michael Brodie
Copyright 1993, by Bill Adler Books, Inc.
William Morrow and Co. Inc., New York
ISBN 0-688-11536-5
