Skip to content

And The World Did Not Beat A Path To His Door

4,400 attempts at a solved problem

Browse Dates Inventors Types About

Patented November 19, 1963

Patent	Title	Inventor
US 3,111,608	CONTACT SWITCH DEVICE	Robert A. Boenning

United States patent drawings and specifications are works of the U.S. government and are in the public domain — they were never copyrighted. Download them, print them, frame them. Our commentary and descriptions are © 2026 And The World Did Not Beat A Path To His Door.

About · Terms · Privacy · Corrections welcome — this archive gets better when collectors write in.