Toy locomotive sound effects
United States Patent 2882834
Inventors:
Smith, William R.
Publication Date:
04/21/1959
Other Classes:
446/410, 340/384.300, 246/473R
International Classes:
A63H19/14; A63H19/00
US Patent References:
| 2792409 | Vibratory impulsed circuits with booster | | | |
| 2826996 | Vibrator operated load and signal system | | | |