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US Patent: 301,722
Dental Engine
Patentee:
William A. Johnson (exact or similar names) - Clifton, Richmond County, NY

USPTO Classifications:
433/107, 433/113

Tool Categories:
specialty machines : dental apparatus

Assignees:
S. S. White Dental Mfg. Co. - Philadelphia, PA

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Jul. 15, 1879
Granted: Jul. 08, 1884

Patent Pictures:
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