Title:
Space reservation system
United States Patent 2542890
US Patent References:
Signaling system
- - 1911949
Electrical signaling and indicating means
- - 1969369
Selecting system
- - 1986972
Method of and apparatus for recording and disseminating information
- - 2224244
Registering system
- - 2432324
Signaling system
- - 1911949
Electrical signaling and indicating means
- - 1969369
Selecting system
- - 1986972
Method of and apparatus for recording and disseminating information
- - 2224244
Registering system
- - 2432324
Inventors:
Basu, Deba P.
Moore, John M.
Moore, John M.
Publication Date:
02/20/1951
View Patent Images:
Export Citation:
Assignee:
Basu, Deba P.
Moore, John M.
Moore, John M.
Primary Class:
Other Classes:
340/825.290, 235/385, 340/815.470
International Classes:
G08B5/22
US Patent References:
| 2446037 | Selective signaling system |