Book Description
Beskriver de elementære principper og procedurer for luftnavigation.
Author : J. E. Dumbleton
Publisher :
Page : 218 pages
File Size : 10,87 MB
Release : 1920
Category : Aeronautics
ISBN :
Beskriver de elementære principper og procedurer for luftnavigation.
Author :
Publisher :
Page : 880 pages
File Size : 46,12 MB
Release : 1911
Category : Radio
ISBN :
Author : Great Britain. War Office. Library
Publisher :
Page : 1446 pages
File Size : 22,86 MB
Release : 1913
Category : Great Britain
ISBN :
Author : Edward Dobson
Publisher :
Page : 310 pages
File Size : 41,41 MB
Release : 1921
Category : Brickmaking
ISBN :
Author :
Publisher :
Page : 394 pages
File Size : 29,26 MB
Release : 1911
Category : Electric industries
ISBN :
Author :
Publisher :
Page : 494 pages
File Size : 27,86 MB
Release : 1911
Category : Electric apparatus and appliances
ISBN :
Author : United States. Adjutant-General's Office
Publisher :
Page : 152 pages
File Size : 24,33 MB
Release : 1931
Category :
ISBN :
Author : Horatio Alvah Foster
Publisher :
Page : 1676 pages
File Size : 16,8 MB
Release : 1913
Category : Electrical engineering
ISBN :
Author : United States. Army
Publisher :
Page : 144 pages
File Size : 36,6 MB
Release : 1931
Category : Military art and science
ISBN :
Author : Lewis Coe
Publisher : McFarland
Page : 240 pages
File Size : 20,81 MB
Release : 2006-01-17
Category : History
ISBN : 0786426098
On March 7, 1876, the U.S. Patent Office issued to a young inventor named Alexander Graham Bell what is arguably the most valuable patent ever: entitled "improvements in telegraphy," in truth it secured for Bell the basic principles involved in a telephone. On the same day that Bell filed his patent application, a caveat (a preliminary patent document) was filed by Elisha Gray. This coincidence sparked the first of many debates over whether Bell was the true inventor of the telephone. In the early 1860s Johann Phillipp Reis developed a version of the instrument, but his claims against Bell were hampered by the bungling of his lawyers in demonstrating his instrument in court. This work is a first look at the many men who developed the telephone and an examination of their claims against Bell's patent. A lay description of the phone is also provided, as well as a history of the development of the telephone system.