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US Patent: 99,212
Improvement in clamp
Jacob S. Ladow - Mechanicsville, NY

USPTO Classifications:
269/221, 269/240

Tool Categories:
work holding : clamps


Rowley & Hermance Co. - Williamsport, PA

Orville D. Vaughn
John A. Wiedersheim

Patent Dates:
Granted: Jan. 25, 1870

Patent Pictures: [ 1 | 2 | 3 ]
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"Vintage Machinery" entry for Rowley & Hermance Co.
An example of this patent is seen in the January 1894 Manning, Maxwell & Moore catalog, page 532. There is no maker's name but the patent date is clearly legible. We found a later version in a 1925 Yates-American catalog and then in a 1905 Y-A catalog where it was labeled as the "R & H Special Heavy Door Clamp". On page 34 of the 1882 Rowley & Hermance catalog is the same artwork as in the MM&M catalog except that the right side casting has the words "LADOW'S PAT. / ROWLEY & HERMANCE MNFRS / WILLIAMSPORT".

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