Communications: electrical – Systems – Call station
Patent
1978-11-15
1980-11-18
Pitts, Harold I.
Communications: electrical
Systems
Call station
340286M, 116279, 40573, G08B 500
Patent
active
042348692
ABSTRACT:
An indicator system for a merchandise display rack indicates a related article as a signal is energized indicating the position of the merchandise on the rack. The signal is timed. Other signals give different indications in the same way and cancel prior indications not appropriate to the current signals indicated.
REFERENCES:
patent: 1219230 (1917-03-01), Blackmore
patent: 2159925 (1939-05-01), Wood
patent: 2204315 (1940-06-01), Levin
patent: 2455210 (1948-11-01), Anderson
patent: 2542890 (1951-02-01), Basu
patent: 3292489 (1966-12-01), Johanson
patent: 3573792 (1971-04-01), Reed
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