A63K3/00- Equipment or accessories for racing or riding sportsġ2.A63K- RACING RIDING SPORTS EQUIPMENT OR ACCESSORIES THEREFOR.230000021037 unidirectional conjugation Effects 0.000 description 2.229910010271 silicon carbide Inorganic materials 0.000 description 2.108010084652 homeobox protein PITX1 Proteins 0.000 description 2.229910001651 emery Inorganic materials 0.000 description 2.230000023298 conjugation with cellular fusion Effects 0.000 description 2.229910000831 Steel Inorganic materials 0.000 description 2.239000007858 starting material Substances 0.000 description 10.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by J Potgieter filed Critical J Potgieter Priority to US12862271 priority Critical patent/US3799542A/en Application granted granted Critical Publication of US3799542A publication Critical patent/US3799542A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number Inventor J Potgieter Original Assignee J Potgieter Priority date (The priority date is an assumption and is not a legal conclusion.
Using track starting blocks pdf#
Google Patents Starting blocks for athletesĭownload PDF Info Publication number US3799542A US3799542A US12862271A US3799542A US 3799542 A US3799542 A US 3799542A US 12862271 A US12862271 A US 12862271A US 3799542 A US3799542 A US 3799542A Authority US United States Prior art keywords starting block starting strut foot support block apparatus Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
Google Patents US3799542A - Starting blocks for athletes US3799542A - Starting blocks for athletes
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