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US Patent: 728,423
Floor surfacer, cleaner, and polisher
Patentees:
Samuel B. Zimmer (exact or similar names) - Oakland, CA
John H. Prugh (exact or similar names) - Oakland, CA
Aaron T. Spence (exact or similar names) - Alameda, CA

USPTO Classifications:
451/352

Tool Categories:
woodworking machines : sanding machines

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Fred B. Wood
Henry Parker

Patent Dates:
Applied: Feb. 24, 1902
Granted: May 19, 1903

Reissue Information:
Reissued as RE12,681 (Aug. 20, 1907)

Patent Pictures:
USPTO (New site tip)
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