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- Q7042790 subject Q8842773.
- Q7042790 subject Q8843089.
- Q7042790 subject Q9419757.
- Q7042790 abstract "The multi-colored no-line tennis court is a variant design for a tennis court introduced by World TeamTennis (WTT) during its early years.The different areas of the no-line tennis court are defined by colors instead of white lines. White lines on a standard tennis court. are painted onto a single, or two-tone, colored background, as required by the rules of the United States Tennis Association (USTA) and the International Tennis Federation (ITF).The original multi-colored, no-line tennis court has eleven separate colored areas with no segregating lines. As a functional, no-line tennis court design it was issued a USPTO utility patent #4,045,022 in 1977 to its inventors, Geoffrey Grant, an avid and successful senior tennis competitor, and Robert Nicks, an engineer. These two inventors also developed, tested and patented (USPTO patent. # 3,982,759 the original tennis electronic line judge used by the men's World Championship Tennis and women's tennis tours in 1974–75Distinctively, the no-line, multi-colored tennis court deviates from both the USTA and the ITF rules because the court‘s playing zones are separated by color instead of lines. Specifically, the court lacks a line dividing the service courts that is two inches wide and twenty-one feet long, and within the rules of tennis, this line is considered to be a part of both service zones. During play, a tennis ball served that hits the shared line is playable from either side service positions. In the absence of the line the size of both service areas deviates from the rules because each court is one inch [2.5 cm] narrower than specified by the USTA and the ITF.The multi-colored court used by the Advanta WTT sponsored league in 2008–09 is a compromise in that it has both white lines and the colored areas that satisfies both the rules of the tennis organizations and media appeal.".
- Q7042790 thumbnail Barney_Allis_Plaza_tennis_Kansas_City_MO.jpg?width=300.
- Q7042790 wikiPageExternalLink patents?id=k3N8AAAAEBAJ&dq=3,982,759.
- Q7042790 wikiPageExternalLink patents?id=d34zAAAAEBAJ&dq=4,045,022.
- Q7042790 wikiPageExternalLink www.wtt.com.
- Q7042790 wikiPageWikiLink Q1044168.
- Q7042790 wikiPageWikiLink Q1156323.
- Q7042790 wikiPageWikiLink Q1459541.
- Q7042790 wikiPageWikiLink Q1991741.
- Q7042790 wikiPageWikiLink Q223041.
- Q7042790 wikiPageWikiLink Q2825384.
- Q7042790 wikiPageWikiLink Q5358384.
- Q7042790 wikiPageWikiLink Q5534616.
- Q7042790 wikiPageWikiLink Q741118.
- Q7042790 wikiPageWikiLink Q8842773.
- Q7042790 wikiPageWikiLink Q8843089.
- Q7042790 wikiPageWikiLink Q9419757.
- Q7042790 comment "The multi-colored no-line tennis court is a variant design for a tennis court introduced by World TeamTennis (WTT) during its early years.The different areas of the no-line tennis court are defined by colors instead of white lines. White lines on a standard tennis court.".
- Q7042790 label "No-line court".
- Q7042790 depiction Barney_Allis_Plaza_tennis_Kansas_City_MO.jpg.