Madison Farmer is Granted Patent on Second Invention
Barn Door Track Second Successful Idea in Past Few Years.
Otto Linstadt, well known Green Garden farmer, recently secured patent rights on a door track and hangar, an invention on which he has labored for several years. The patent will be issued by the U. S. Commissioner of Patents on April 26, Mr. Linstadt has been advised. This is the second invention patented by Linstadt in the past few years. A float valve on which he secured a patent several years ago has been manufactured in large quantities and is in use throughout the country. The door track will be manufactured by the Eaton Metal Products Company of Omaha and distributed by Paxton & Gallagher Company.
Source: Madison Star-Mail, Thursday, April 6, 1931, page 4.