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CA Patent: CA-585,901
Multi-speed drive
Patentees: Yih-O Tu (exact or similar names) - Pittsburgh, PA David D. Pettigrew (exact or similar names) - Pittsburgh, PA USPTO Classifications: Tool Categories: metalworking machines : metal sawing machines : metal cutting bandsaws woodworking machines : bandsaws Assignees: Rockwell Mfg. Co. - Pittsburgh, PA Manufacturer: Rockwell Mfg. Co. - Pittsburgh, PA Witnesses: Unknown	Patent Dates: Applied: Feb. 28, 1955 Granted: Oct. 27, 1959 Patent Pictures: CIPO Data Espacenet patent Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Delta Specialty/Delta Mfg. Co./Delta-Rockwell/Rockwell Intl.
Description: The patent number was listed in a 1965 catalog of machinery from Rockwell Mfg. Co. The patent is the Canadian equivalent of US patent 2,830,628.

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