Automatic time-switch.

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US878248A Automatic time-switch. 失效

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Patent Title: Automatic time-switch.
Application No.: US1907405874

Application Date: 1907-12-10
Publication No.: US878248A

Publication Date: 1908-02-04
Inventor: SNELL HARRY B
Applicant: SNELL JUDD COMPANY
Assignee: Snell Judd Company
Current Assignee: Snell Judd Company
Priority: US1907405874 1907-12-10

Automatic time-switch.

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