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US Patent: 3,584,927
Biology study enclosure
Patentees: Arthur W. Carlson (exact or similar names) - Muskegon, MI Donald E. Ott (exact or similar names) - Muskegon, MI USPTO Classifications: 119/319, 250/458.1, 312/128, 312/209, 312/236, 47/16 Tool Categories: Assignees: E. H. Sheldon & Co. - Muskegon, MI Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jul. 10, 1969 Granted: Jun. 15, 1971 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for E. H. Sheldon & Co.

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