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US Patent: 1,028,923
Self-adjusting clamp-bar for door and furniture clamps
Patentee:
Frederick Welker (exact or similar names) - Williamsport, PA

USPTO Classifications:
269/271

Tool Categories:
work holding : clamps

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Hugh Gilmore
Albert T. Lehman
Patent Dates:
Applied: Feb. 09, 1911
Granted: Jun. 11, 1912

Patent Pictures:
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