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F. W. BARNES. LENS GRINDING MACHlNE APPLICATION mfp MAR. 24. |916. l,276,770. Patented July 2, 1918. ` be made use of in preparing photogr UNITED STATES PATENT OFFICE.
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VALVE GRINDING MACHINE. APPLCATION FILED OCT. 4. 1916. Patented Feb. 12, 1918. WITNESSES ATTORNEY .spindle thereof with …
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Try the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents. Veröffentlichungsnummer: US2371085 …
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