Title:
Special service communication system
Document Type and Number:
United States Patent 2270915

Inventors:
Abbott, Henry H.
Bowne, Langford J.
Albert, Tradup
Publication Date:
01/27/1942
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:
379/203.010
Other Classes:
379/215.010
International Classes:
H04M3/56




<- Previous Patent (Dispenser)   |   Next Patent (Operating apparatus ...) ->