United States Patent 2765552
Inventors:
Schlafly, Hubert J.
Publication Date:
10/09/1956
Assignee:
TELEPROMPTER CORP
Other Classes:
40/522, 348/E05.023, 40/471
International Classes:
H04N5/222
US Patent References:
| 1719606 | Advertising device | | | |
| 1761737 | Station indicator | | | |
| 1768235 | Station and route indicator for railway trains, trams, and other fixed route vehicles | | | |
| 2073437 | Stopping-place indicator for vehicles | | | |
| 2113324 | Reversible changeable exhibitor | | | |
| 2192072 | Automatic advertising apparatus | | | |
| 2343294 | Traveling message sign | | | |
| 2440176 | Motor drive system | | | |