Slope determination system

Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive

Reexamination Certificate

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C033S344000, C033S451000

Reexamination Certificate

active

06968627

ABSTRACT:
A hand-held system for determining the slope of an element having an irregular surface, such as a shingled roof, or along a surface that is partially obscured by adjacent elements. The system comprises an inclinometer having a double indicator to provide two simultaneous readings of slope.

REFERENCES:
patent: 803287 (1905-10-01), Hodgson
patent: 1111706 (1914-09-01), Ritty
patent: 1313263 (1919-08-01), Conn
patent: 1481716 (1924-01-01), Ketchum
patent: 1597960 (1926-08-01), Eltag
patent: 1664365 (1928-03-01), Katolin
patent: 1901793 (1933-03-01), Allen
patent: 1919106 (1933-07-01), Hamernick
patent: 2654158 (1953-10-01), Clyde
patent: 2694865 (1954-11-01), Le Pera
patent: 2847765 (1958-08-01), Bateman
patent: 5519942 (1996-05-01), Webb
patent: 5713135 (1998-02-01), Acopulos
patent: 5956260 (1999-09-01), Heger et al.

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