Electric tape winding and display device
United States Patent 3145943
Publication Date:
08/25/1964
Other Classes:
242/575.300, 242/571.600, 242/598.400, 242/599.300, 242/545, 242/578.200
International Classes:
G06K13/26; G06K13/00
US Patent References:
| 3095157 | Power operated chart storage means | | | |