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United States of America Patent

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Sep 8, 1987
Grant Date
N/A
app pub date
Mar 19, 1986
filing date
Mar 19, 1986

priority date (Note)
Expired

status (Latency Note)

Importance

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Abstract

Switches of telephone grids are tested for delayed action subsequent to, but within a number of milliseconds after, actuating the opening or closing of the switches. Excessive delay indicates approaching failure.

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First Claim

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Patent Owner(s)

Patent Owner	Address
COMMUNICATIONS TEST DESIGN INC WEST CHESTER PA A CORP OF PA	Not Provided

International Classification(s)

H04M:TELEPHONIC COMMUNICATION

[Classification Symbol]

[Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Parsons, Donald F	West Chester, PA	5	230

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United States of America Patent

06841173

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Importance

Abstract

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Family

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US Family Size	Non-US Coverage
Patent Longevity Expired	Forward Citations

PATENT NO	4692939
SERIAL NO	06841173
DOCKET NO

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06841173

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Importance

Abstract

First Claim

Family

Patent Owner(s)

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Inventor(s)

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Forward Cite Landscape

Maintenance Fees

Full Text

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