Patent classifications
A
HUMAN NECESSITIES
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A63
SPORTS; GAMES; AMUSEMENTS
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A63C
SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
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19/00
Design or layout of playing courts, rinks, bowling greens or areas for water-skiing; Covers therefor
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A63C19/06
Apparatus for setting-out or dividing courts
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A63C19/065
Line markings, e.g. tapes; Methods therefor
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A63C2019/067
Machines for marking
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