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Demonstration Device (US Patent 2,205,692, 1940)

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Reginald L. Johnson, Robert F. Knapp, Cooper Peter and Edwin J. Lyons received US Patent No. 2,205,692 on June 25, 1940, filed September 15, 1938.

The patent's description opens (from the scanned text):

The present invention relates to a display and demonstration device, and more particularly, to a portable device for demonstrating the construction of laminated structures and the like. t The invention is concerned with, and has as its principal object, the provision of a demonstration device, as referred to above, arranged to portray in an interestng and accurate manner the several steps employed in the construction of a laminated covering, particularly a builtup roof structure.

Author
Reginald L. Johnson; Robert F. Knapp; Cooper Peter; Edwin J. Lyons
Published by
US Patent Office
Series
US Patent No. 2,205,692
Date
June 25, 1940
Library no.
ACL Doc 22181 · asbestosclaims.law/library/22181
Rights
US government work, in the public domain.

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Cite this document

Reginald L. Johnson, Robert F. Knapp, Cooper Peter, Edwin J. Lyons. “Demonstration Device (US Patent 2,205,692, 1940).” June 25, 1940. US Patent No. 2,205,692. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22181. https://asbestosclaims.law/library/22181.

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