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2797407
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Information
Patent Grant
2797407
References
Source
Patent Number
2,797,407
Date Filed
Not available
Date Issued
Tuesday, June 25, 1957
67 years ago
CPC
H04M3/64 - Arrangements for signalling the number or class of the calling line to the operator
H02B15/00 - Supervisory desks or panels for centralised control or display
F21W2111/00 - Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in code F21W2101/00
US Classifications
340 - Communications: electrical
362 - Illumination
439 - Electrical connectors
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