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US Patent: 764,282
Battery-cell
Patentee: William O. Duntley (exact or similar names) - Chicago, IL USPTO Classifications: 174/522, 220/235, 429/95 Tool Categories: Assignees: None Manufacturer: Not known to have been produced Witnesses: George H. Hayes Louis B. Erwin	Patent Dates: Applied: Jan. 15, 1904 Granted: Jul. 05, 1904 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Chicago Pneumatic Tool Co.

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