1
Frederick T Haas Jr: Synthetic turf playing surface with resilient top-dressing. Schwartz Jeffery Schwaab Mack Blumenthal & Koch, June 29, 1982: US04337283 (77 worldwide citation)

A playing surface for athletic games comprising a stable subsurface, a pile fabric resembling grass and a compacted top-dressing comprising a mixture of from 25 to 95 volume percent resilient particles and from 5 to 75 volume percent fine sand. The inventive surface is particularly suited for use as ...


2
Haas Frederick T Jr: Simili-gazon a recouvrement souple pour aires de jeux, Synthetic turf playing surface with resilient top dressing. Mod Sod Sports Surfaces, GOWLING LAFLEUR HENDERSON, February 12, 1985: CA1182484 (3 worldwide citation)

Abstract of the Disclosure A playing surface for athletic gamescomprising a stable subsurface, a pile fabricresembling grass and a compacted top-dressingcomprising a mixture of from 25 to 95 volumepercent resilient particles and from 5 to 75volume percent fine sand. The inventive surface isparticula ...