Title:
Cathode-ray tube amusement device
United States Patent 2455992

Inventors:
Goldsmith Jr., Thomas T.
Ray, Mann Estle
Publication Date:
12/14/1948
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Assignee:
DU MONT ALLEN B LAB INC
Primary Class:
315/383
Other Classes:
463/2, 345/12
International Classes:
A63F9/00; A63F9/02; H03K6/02; H03K6/00
US Patent References:
2413785
2425330Cathode-ray system with bright and dark marker indications