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Matches 1 - 7 out of 7

Match	Document	Document Title
1	D255102	Household water leak indicator
2	2984702	Call-holder and dial-through plug for cord-operated switchboards
3	2894074	Telephone conference circuit
4	2848548	Conference circuit
5	2827517	Supervisory signal
6	2805287	Toll line switching for prefered subscribers in telephone systems
7	2707728	Connector

Matches 1 - 7 out of 7