Improvements in or relating to a marking system

Details Improvements in or relating to a marking system Improvements in or relating to a marking system

1975-05-01

1976-06-29

Chamblee, Hugh R.

Card, picture, or sign exhibiting

Display card

Having a curved display panel

116 63R, 404 9, G09F 1922

Patent

active

039655962

ABSTRACT:
A marking system for ski runs or the like wherein a plurality of demarcation signs, each of preferably spherical shape and with two halves which are differently colored, are symmetrically arranged along the two edges of the run.

REFERENCES:
patent: 270223 (1883-01-01), Ingus
patent: 2318722 (1943-05-01), Smith et al.
patent: 2887930 (1959-05-01), Zoffmann
patent: 3312156 (1967-04-01), Pellowski
patent: 3768383 (1973-10-01), Tucker

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