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US Patent: 3,594,460
Method for preparing a laboratory counter top
Patentees: Murray A. Schwartz - Glencoe, IL Harold L. Rechter - Chicago, IL USPTO Classifications: 280/250.1, 297/397, 297/403, 297/DIG.4 Tool Categories: Assignees: E. H. Sheldon & Co. - Muskegon, MI Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Aug. 05, 1968 Granted: Jul. 20, 1971 Patent Pictures: USPTO Images Google Patents Report data errors or omissions "Vintage Machinery" entry for E. H. Sheldon & Co.

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