Title:
Magnetic circuit comprising a ferromagnetic part having high permeability and a substantially flat, thin permanent magnet
United States Patent 2698917
US Patent References:
Telephone transmitter and receiver
- - 2400662


Inventors:
Urk, Arend Thomas Van
Adriaan, Rademakers
Publication Date:
01/04/1955
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Assignee:
HARTFORD NAT BANK & TRUST CO
Primary Class:
335/302
Other Classes:
324/152, 252/62.630, 381/420
International Classes:
H01F1/03; H01F7/02; H04R9/02; H04R9/00
Foreign References:
GB406086A
FR867783A