Method and apparatus for the trenchless laying of pipework underground

United States of America Patent

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Dec 10, 2002
Grant Date
Aug 15, 2002
app pub date
Apr 21, 1999
filing date
Apr 22, 1998

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Expired

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Abstract

Apparatus and method for the trenchless laying of pipework underground, having a total and a gauge for the continuous widening of a preferably wound preformed pipe on a linkage for use in pits of small dimensions, preferably inspection shafts of sewage systems.

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Patent Owner(s)

Patent Owner	Address
TRACTO-TECHNIK PAUL SCHMIDT SPEZIALMASCHINEN	57368 LENNESTADT

International Classification(s)

F16L:PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR ....

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[Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Hesse, Alfons	Lennestadt, DE	28	327

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Method and apparatus for the trenchless laying of pipework underground

Number of patents in Portfolio can not be more than 2000

United States of America Patent

09295650

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PATENT NO	6491476
APP PUB NO	20020110425A1
SERIAL NO	09295650
DOCKET NO

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

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
December 10, 2002	US,6491476,B2 US6491476B2	GRANTED PATENT AS SECOND PUBLICATION
August 15, 2002	US,20020110425,A1 US20020110425A1	FIRST PUBLISHED PATENT APPLICATION

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09295650

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