ROTATING MAGNETICALLY ACTUATED DISPLAY OR INDICATOR
United States Patent 3469258
US Patent References:
/2996705.html
- - 2996705

Electromagnetic display device
- - 3036300

Magnetically operated sign
- - 3140553

Pulse scanned reflective display
- - 3267455


Inventors:
Winrow, Donald
Publication Date:
09/23/1969
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Assignee:
FERRANTI PACKARD LTD
Primary Class:
340/815.440
Other Classes:
340/815.830, 40/449, 345/111
International Classes:
G08B5/24; G09F9/37; G08B5/22; G08B5/22




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