Title:
Adjustable-intensity electromagnetic audible-signal device
Document Type and Number:
United States Patent 2442016

Inventors:
Poole, Arthur B.
Publication Date:
05/25/1948
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:
Poole, Arthur B.
Primary Class:
340/392.300
Other Classes:
335/237, 335/243, 310/29, 310/19
International Classes:
G10K1/064; G10K1/00
US Patent References:
1206988
1906027Vibrator control device
1959470Signal instrument
2165123Contact microphone
2318359Electromagnet


<- Previous Patent (Dehydrator for ignit...)   |   Next Patent (Welding control syst...) ->