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US Patent: 1,381,457
Tool Holder
Patentee:
Maurice H. Derringer (exact or similar names) - Philadelphia, PA

USPTO Classifications:
407/67, 407/89, 407/9

Tool Categories:
metalworking machines : metal lathes : lathe tool holders and tool posts

Assignees:
None

Manufacturer:
Maurice H. Derringer - Philadelphia, PA

Witnesses:
none listed
Patent Dates:
Applied: May 01, 1920
Granted: Jun. 14, 1921

Patent Pictures: [ 1 | 2 ]
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