Gypsum board grooving system

United States of America Patent

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Nov 13, 1990
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N/A
app pub date
Nov 27, 1989
filing date
Nov 27, 1989

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Expired

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Abstract

An apparatus and method for forming a flat-bottomed V-groove in wallboard involving a pair of oppositely angled circular saws, wherein saw blades have an obtusely angled outer edge, as by grinding back one corner of each of a plurality of carbide tips on at least one of the two saw blades.

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Patent Owner(s)

Patent Owner	Address
NATIONAL GYPSUM COMPANY	4500 LINCOLN PLAZA 500 N AKARD ST A CORP OF DE DALLAS TX 75201

International Classification(s)

B26D:CUTTING; DETAILS COMMON TO MACHINES FOR SEVERING, ....

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[Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Halligan, William S	East Concord, NY	1	17

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Gypsum board grooving system

Number of patents in Portfolio can not be more than 2000

United States of America Patent

07441870

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PATENT NO	4969380
SERIAL NO	07441870
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07441870

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