Electrical filter
United States Patent 2589133
US Patent References:
/1313070.html
- - 1313070

System for reducing static disturbances
- - 1678653

Repeater circuits
- - 1689318

Electrical transmission system
- - 1759952

Filtering apparatus
- - 1902031


Inventors:
Purington, Ellison S.
Publication Date:
03/11/1952
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Assignee:
John Jr., Hays Hammond
Primary Class:
330/126
Other Classes:
330/138, 333/172, 330/135, 333/174, 333/28T, 327/524
International Classes:
H03H11/12; H03H11/04
US Patent References:
2425968Background noise reducing circuit for audio frequency translating circuit