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CA Patent: CA-77,231
Closure for retorts
Patentees: Frank Watts Burpee (exact or similar names) - Vancouver, BC Canada James Moore K. Letson (exact or similar names) - Vancouver, BC Canada USPTO Classifications: Tool Categories: specialty machines : canning apparatus Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jun. 26, 1902 Granted: Sep. 02, 1902 Patent Pictures: CIPO Data Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Letson & Burpee, Ltd.

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