System and apparatus for secret radio communication - Hammond Jr., John Hays

Title:

System and apparatus for secret radio communication

United States Patent 1838762

Inventors:

Hammond Jr., John Hays

Application Number:

US26236528A

Publication Date:

12/29/1931

Filing Date:

03/17/1928

Export Citation:

Click for automatic bibliography generation

Assignee:

Hammond Jr., John Hays

Primary Class:

380/32

Other Classes:

380/34

International Classes:

H04K1/00

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