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US Patent: RE7,535
Improvement in lathes
Spiral-cutting lathe
Patentee:
David Heer (exact or similar names) - Philadelphia, PA

USPTO Classifications:
142/35

Tool Categories:
woodworking machines : wood lathes

Assignees:
Henry D. Hirst - Philadelphia, PA

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Mar. 02, 1874
Granted: Feb. 27, 1877

Reissue Information:
Reissue of 141,347 (Jul. 29, 1873)

Patent Pictures:
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