Title:
High-frequency multiplex-signaling system
Document Type and Number:
United States Patent 1554188
Inventors:
Affel, Herman A.
Plaque It!
Sponsored by: Flash of Genius |
Publication Date:
09/22/1925
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Referenced by:
Export Citation:
Assignee:
AMERICAN TELEPHONE & TELEGRAPH
Primary Class:
Other Classes:
455/15, 332/182, 455/84, 327/551
International Classes:
H04J1/08; H04J1/00