Telephone line polarity tester

The ornamental design for a telephone line polarity tester, as shown and described.

FIG. 1 is a left and top-front perspective view of a telephone line polarity tester showing my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a rear elevational view thereof.

Patent	Priority	Assignee	Title
6159037,	Nov 05 1998	Hewlett Packard Enterprise Development LP	Illuminated connector
6361357,	Apr 13 2000	HEWLETT-PACKARD DEVELOPMENT COMPANY, L P	Remotely illuminated electronic connector for improving viewing of status indicators
6457992,	Feb 08 1999	Hewlett Packard Enterprise Development LP	Visual feedback system for electronic device
6483712,	Mar 20 2000	HEWLETT-PACKARD DEVELOPMENT COMPANY, L P	Illuminating electrical jack system
6724889,	Nov 01 1999	Hewlett Packard Enterprise Development LP	Method and system for line status indicators using line side power
7713082,	Nov 29 2006		Multi-functional shackle structure

Patent	Priority	Assignee	Title
4263550,	Apr 10 1978		Test point mounted circuit condition indicator
4533796,	Jan 30 1984		Rotatable electrical connector for telephone cord
4533864,	Apr 21 1983	Nortel Networks Limited	Test instrument with flexibly connected head
4564728,	Apr 13 1984	Comus International, Inc.	Apparatus for testing a telephone line
4600810,	Sep 07 1984	AMP Incorporated	Telephone line tester
4620070,	Feb 04 1985	Illinois Tool Works Inc.	Telephone line tester
4626633,	Feb 04 1985	Illinois Tool Works, Inc.	In-line switched telephone line tester
D288416,	Apr 13 1984	Comus International, Inc.	Telephone line test light or similar apparatus

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