Hoerninger
11-25-2015, 04:14 PM
Patent No. 1992268 retrieved by www.Pat2PDF.org (http://www.Pat2PDF.org)
Looks like a predecessor of the Smth Horn,
Enjoy :)
___________
Peter
Looks like a predecessor of the Smth Horn,
Enjoy :)
___________
Peter
View Full Version : Patent 1935: Acoustic Device by E.C.Wente