US 11,944,881 B2
Tennis net tension system including service let indication feature
Fredric Goldstein, Nacka (SE)
Assigned to Group One Limited, (GB)
Filed by Group One Limited, Ramsey (GB)
Filed on Jul. 14, 2023, as Appl. No. 18/221,986.
Application 18/221,986 is a continuation of application No. 17/212,184, filed on Mar. 25, 2021, granted, now 11,738,248.
Application 17/212,184 is a continuation in part of application No. 16/781,245, filed on Feb. 4, 2020, granted, now 11,318,362, issued on May 3, 2022.
Application 16/781,245 is a continuation of application No. 16/277,095, filed on Feb. 15, 2019, granted, now 10,583,341, issued on Mar. 10, 2020.
Application 16/277,095 is a continuation of application No. 16/124,424, filed on Sep. 7, 2018, granted, now 10,272,307, issued on Apr. 30, 2019.
Application 16/124,424 is a continuation in part of application No. 15/601,721, filed on May 22, 2017, granted, now 10,080,943, issued on Sep. 25, 2018.
Application 15/601,721 is a continuation in part of application No. 14/646,230, granted, now 9,687,707, issued on Jun. 27, 2017, previously published as PCT/US2013/072408, filed on Nov. 27, 2013.
Claims priority of provisional application 61/737,284, filed on Dec. 14, 2012.
Claims priority of provisional application 61/730,238, filed on Nov. 27, 2012.
Prior Publication US 2023/0356051 A1, Nov. 9, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. A63B 61/00 (2006.01); A63B 61/04 (2006.01); A63B 71/06 (2006.01); A63B 102/02 (2015.01)
CPC A63B 61/04 (2013.01) [A63B 71/0608 (2013.01); A63B 71/0622 (2013.01); A63B 2071/0613 (2013.01); A63B 2071/0625 (2013.01); A63B 2071/0655 (2013.01); A63B 2102/02 (2015.10); A63B 2220/51 (2013.01); A63B 2225/50 (2013.01); A63B 2225/74 (2020.08)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
indicating, using an indicator, that an impact between a ball and a tennis net has occurred;
arming a let detection function, wherein the indicating step is only performed when the let detection function has been armed; and
starting a shot clock in order to help enforce a time limit imposed upon a player at various stages of a tennis match, wherein the steps of arming the let detection function and starting the shot clock are initiated by a chair umpire during a tennis match.