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US Patent: 608,854
Ball-bearing
Patentees: Carl L. Grohmann (exact or similar names) - Hartford, CT Lewis E. Harper (exact or similar names) - Hartford, CT USPTO Classifications: 384/531 Tool Categories: industrial machines : industrial machine mechanisms : industrial machine bearings Assignees: Pratt & Whitney Co. - Hartford, CT Manufacturer: Pratt & Whitney Co. - Hartford, CT Witnesses: Henry Bissell Richard F. Dow	Patent Dates: Applied: Oct. 28, 1897 Granted: Aug. 09, 1898 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Pratt & Whitney Co.
Description: See patent 612,412 for more on co-inventor Carl L. Grohmann.

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