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Re: ViewMaster Viewer patent numbers
- From: P3D <klein@xxxxxxxxxxxxxxxxx>
- Subject: Re: ViewMaster Viewer patent numbers
- Date: Tue, 20 May 1997 07:41:51 +0200
On 19 May 97 at 21:50, P3D Andrew Woods wrote:
> Mike Zohn wrote:
> > Does anyone have a list of the different View Master viewers and their
> > patent numbers? I ask because people often(well not that often) will offer
> > me "an old viewmaster viewer" with no other info. This way I can figure
> > out which model they have...Mike
>
> Firstly there won't be be individual patents for each individual
> viewer design - that's not how patents work. The underlying ideas
> behind viewmaster reels, images and viewers may be patented
> but not individual viewer designs.
That's right! William Biller Gruber patented the viewer here in Germany on
February 11th, 1950 (patent-# 826367, class 42h, group 22/02).
And there's another patent by Maurice James Merrick dated October 22nd,
1952 (patent-# 940614, class 42h, group 22/02).
The Talking View-Master was patented by Marvin Irving Glass, Chicago, on
March 16th, 1967 (patent-# 1547412, class 42h, group 22/04).
Alexander Klein
3D-Magazin, Editor (http://www.stereoscopy.com/3d-magazin)
Webmaster: http://www.stereoscopy.com
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