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US Patent: 383,955
Machine for making school-slate frames
Patentee:
George L. Knauss - Allentown, PA

USPTO Classifications:
144/41

Tool Categories:
woodworking machines : specialty machines

Assignees:
Hyatt School Slate Co., Ltd. - Allentown, PA

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Jan. 09, 1888
Granted: Jun. 05, 1888

Patent Pictures:
USPTO pdf tiff
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