SPORTS GROUND BOUNDARY LINE INDICATING DEVICE Russian patent published in 1997 - IPC

Abstract RU 2090230 C1

FIELD: sports equipment. SUBSTANCE: device has sports ground boundary marking line defined by substrate 1 covered with layer of marking paint 2, winding 3 connected with indicator 5, ball 6 with surface coated with ferromagnetic material. EFFECT: increased efficiency and simplified construction. 4 dwg

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RU 2 090 230 C1

Authors

Mikheev Georgij Konstantinovich

Dates

1997-09-20—Published

1991-12-24—Filed