Title :
Digests of United States Patents relating to radio telegraphy and telephony
Author_Institution :
Patent Lawyer, Ouray Building, Washington, D.C.
Abstract :
These patent abstracts of recently issued patents are intended to provide the minimum information necessary for readers to determine if they are interested in examining the patent in more detail. Complete copies of patents are available for a small fee by writing: US Patent and Trademark Office, Washington, DC, USA.
Keywords :
Acoustic devices; Circuit testing; Detectors; Frequency; Laboratories; Lamps; Patents; Relays; Telegraphy; Telephony;
Journal_Title :
Radio Engineers, Proceedings of the Institute of
DOI :
10.1109/JRPROC.1927.221154
