Motion Picture Projector Support Electrical Research Products Inc. Original Patent Lithograph 1932
Motion Picture Projector Support Electrical Research Products Inc. Original Patent Lithograph 1932
Motion Picture Projector Support Electrical Research Products Inc. Original Patent Lithograph 1932

Motion Picture Projector Support Electrical Research Products Inc. Original Patent Lithograph 1932


Please call us or email us for current pricing.

DESCRIPTION:

On this original linen-backed lithograph from 1932 (includes original specification sheet), Electrical Research Products Incorporated patented an adjustable support got motion picture projectors. In 1930 AT&T's Western Electric established a division to install and service loudspeakers and electronic products for motion-picture use. Named Electrical Research Products, Inc. and commonly referred to by the acronym ERPI, it became the target of an anti-trust suit brought by Stanley K. Oldden. By 1936, Western Electric had shed its audio-equipment manufacturing and sales division, bought by International Projector and Motiograph, and was looking to dissolve the associated service division.

All patent lithographs sold by Maymont Group are 100% ORIGINAL.

These documents are NOT reproductions or posters (patent art).

These are the original lithographs found in books obtained from the Patent and Trademark Office directly.

 

In the 1800's and early 1900's, inventors would submit a detailed drawing of the invention and/or improvements to the patent and trademark office. Once received and if approved, the Patent office would then send a letter of confirmation to the inventor and begin to take that drawing and etch it into stone in order to create and print this linen-backed lithograph. These documents are the original hard copies that were created by the patent office's artists, and act as patent examiner reference material. With that being said, these are 100% original and are the only physical copies in existence.

If you have any other inquiries concerning our business or the patents we are selling, please do not hesitate to contact us and we will respond promptly.