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William A. Blume received US Patent No. 1,924,021 on August 22, 1933, filed January 5, 1931. It was assigned to American Brakeblock Corp.
The patent's description opens (from the scanned text):
This invention relates to composition friction elements and its object is to provide a novel friction element which is flexible and tough, which is wear and heat resistant and which can be readily and easily prepared and formed to shapes for brakes, clutches and other mechanical devices wherein a braking or retarding effect is required.
- Author
- William A. Blume
- Published by
- US Patent Office
- Series
- US Patent No. 1,924,021
- Date
- August 22, 1933
- Library no.
- ACL Doc 22384 · asbestosclaims.law/library/22384
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 1 pages · 142 KB
Where it was listed
- Asbestos, November 1933, in its patents department (the year's issues)
Cite this document
William A. Blume. “Friction Element (US Patent 1,924,021, 1933).” August 22, 1933. US Patent No. 1,924,021. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22384. https://asbestosclaims.law/library/22384.
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