Assignee

PRESTON SPORTS PRODUCT CORP

US·2 granted patents·35 citations·filing 1990–1991

Technology mixA63B2

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2 records

0140US5056781ATethered ball pitching apparatusPRESTON SPORTS PRODUCT CORP·Filed 1990·Granted Oct 15, 1991·18 cites·18 claims
0239US5255911ATethered ball pitching apparatus and methodPRESTON SPORTS PRODUCT CORP·Filed 1991·Granted Oct 26, 1993·17 cites·14 claims

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