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US Patent: 3,983,595
Arcuate Scraper for Concave Surfaces
Raymond G. Knudsen - Kenosha, WI
Steven R. Wente - Kenosha, WI

USPTO Classifications:
15/236.02, 15/236.07, 30/162, 30/169

Tool Categories:

Snap-On Tools Corp. - Kenosha, WI

Not known to have been produced

none listed

Patent Dates:
Applied: Dec. 08, 1975
Granted: Oct. 05, 1976

Patent Pictures:
USPTO pdf tiff
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Snap-On Tools Company History
Edward U. Dithmar. - patent attorney


An arcuate scraper for concave surfaces, such as the inside surface of many automobile windshields, having an elongated handle with a forward end portion arcuate in transverse cross section, a scraping blade disposed transversally on the concave surface of the forward end of portion, a longitudinally movable slider connected with the blade for extending and retracting the scraping edge thereof with respect to the forward end of the handle and a tiltable keeper operatively related to the slider for locking same and the blade alternatively in blade-extended and blade-retracted positions.

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