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US Patent: 1,396,391
Power-operated compressor
Patentees:
Frank Ackerman - St. Louis, MO
Charles W. Frees - St. Louis, MO

USPTO Classifications:
417/294, 417/298, 73/494

Tool Categories:
industrial machines : pneumatic : air compressors

Assignees:
Curtis & Co. Manufacturing Co. - Wellston, MO

Manufacturer:
Curtis Manufacturing Co. - Wellston, MO

Witnesses:
Unknown

Patent Dates:
Applied: Jun. 21, 1920
Granted: Nov. 08, 1921

Patent Pictures:
USPTO pdf tiff
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