Playing surface

Details Playing surface Playing surface

1975-09-24

1977-02-22

Murtagh, John E.

Static structures (e.g., buildings)

Specified wear or friction-type traffic-carrying surface

Perforate structure having twisted element or particular...

52581, 52591, E04F 1500

Patent

active

040085481

ABSTRACT:
Multiple plastic molded squares with means to interlock strips of the same so the entire surface expands and contracts during changes in temperature without creating distortion. The top surfaces are rough and under the top surface there are a plurality of projections for supporting the playing surface raised from an underlying base surface.

REFERENCES:
patent: 2119921 (1938-06-01), Levy
patent: 2961779 (1960-11-01), Perry
patent: 3438312 (1969-04-01), Becker
patent: 3581630 (1971-06-01), Del Piano
patent: 3694983 (1972-10-01), Couquet
patent: 3740914 (1973-06-01), Diez
patent: 3802144 (1944-04-01), Spica
patent: 3868798 (1975-03-01), Spica
patent: 3960375 (1976-06-01), Roubi

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