Title:
Alarm and testing circuit
Document Type and Number:
United States Patent 2326290

Inventors:
Diekieson, Alton C.
Publication Date:
08/10/1943
View Patent Images:
Images are available in PDF form when logged in. To view PDFs, Login  or  Create Account (Free!)
Referenced by:
View patents that cite this patent
Export Citation:
Click for automatic bibliography generation
Assignee:
BELL TELEPHONE LABOR INC
Primary Class:
455/67.140
Other Classes:
455/88, 455/67.700, 370/249
International Classes:
H03F1/54; H04B7/155; H04J1/16; H03F1/52; H04J1/00




<- Previous Patent (Spar)   |   Next Patent (Typewriting and like...) ->