Q: For family history I want to verify my father Roy K Runyon had a patent in the 1930's for an oil bath air cleaner AUTOS
The company original company was C.R.C. Air Cleaners, in Spokane Washington, where the first ones were produced for automobiles. There was another company that produced the first ones. Inventor was Roy Kendall Runyon, my father. First produced in Spokane Washington, 1930's. My father later sold the patent rights (for Canada) after losing a lawsuit against the producer/manufactor for non payment.
Take a look at https://patents.google.com/patent/US1788410A/en?oq=US1788410A
There may be other patents in this family but this should get you started. It is hard searching back that far as many of the tools focus on just the last few decades.
I hope this helps.
Kevin E Flynn
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