Title:
Artificial playing surface
United States Patent 3418897
US Patent References:
/1277936.html
- - 1277936

Mat, &c.
- - 1352733

Artificial turf
- - 1949063

Mat construction
- - 1970959

Surfacing material
- - 2515847


Inventors:
Humalainen, Robert A. R.
Publication Date:
12/31/1968
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Primary Class:
472/92
Other Classes:
428/17
International Classes:
E01C13/08
US Patent References:
3323802Putting rug including removable sections to form simulated cups
3348847Golf practice device including simulated divot means




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