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US Patent: 3,072,768
Built-in switch for insulated portable electric tools
Patentees:
Joseph P. Yelpo (exact or similar names) - Somerville, NJ
Reynold Happe (exact or similar names) - Princeton, NJ

USPTO Classifications:
200/277, 200/432, 200/522

Tool Categories:
handheld power tools

Assignees:
Diehl Mfg. Co. - Somerville, NJ

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Aug. 02, 1960
Granted: Jan. 08, 1963

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Diehl Mfg. Co.

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