Vacuum-control system.

Invention Grant

US838209A Vacuum-control system. 失效

Title translation: 真空控制系统。

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Patent Title: Vacuum-control system.
Patent Title (中): 真空控制系统。
Application No.: US1906310046

Application Date: 1906-04-05
Publication No.: US838209A

Publication Date: 1906-12-11
Inventor: PATTERSON CLARENCE G
Applicant: PATTERSON CLARENCE G
Assignee: Clarence G Patterson
Current Assignee: Clarence G Patterson
Priority: US1906310046 1906-04-05

Vacuum-control system.

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