Ventilating apparatus.

Invention Grant

US1301975A Ventilating apparatus. 失效

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Patent Title: Ventilating apparatus.
Application No.: US18628417

Application Date: 1917-08-15
Publication No.: US1301975A

Publication Date: 1919-04-29
Inventor: ROOT RALPH C
Applicant: ROOT RALPH C
Assignee: Ralph C Root
Current Assignee: Ralph C Root
Priority: US18628417 1917-08-15

Ventilating apparatus.

Public/Granted literature

US20240372238A1 GEOMETRIC TRANSFORMATIONS FOR RADIO FREQUENCY (RF) PERFORMANCE IN LAYERED ADDITIVE MANUFACTURING OF PASSIVE AND ACTIVE RF ELECTRONICS Public/Granted day:2024-11-07

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