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William H. Lawrence received US Patent No. 1,780,622 on November 4, 1930, filed April 18, 1927. It was assigned to Johns Manville.
The patent's description opens (from the scanned text):
This invention relates to bridges. andlike structures, and more particularly to protective coverings for railway bridges andthe like. brineand the elements, towhich these The principal object of the invention is the I provision of improved means for protecting the timbers of railway and other bridges from fire and the deteriorating effects of Water, timbers are-normally exposed.
- Author
- William H. Lawrence
- Published by
- US Patent Office
- Series
- US Patent No. 1,780,622
- Date
- November 4, 1930
- Library no.
- ACL Doc 23517 · asbestosclaims.law/library/23517
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 3 pages · 328 KB
Where it was listed
- Asbestos, January 1931, in its patents department (the year's issues)
Cite this document
William H. Lawrence. “Protective Covering for Bridges (US Patent 1,780,622, 1930).” November 4, 1930. US Patent No. 1,780,622. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23517. https://asbestosclaims.law/library/23517.
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