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| Number | Title | Issue Date |
| 7559164 | Football down marker A down marker for use in a football game includes a vertical support and a display panel that extends from the vertical support. This display panel carries an array of solid state lighting devices configured to optically display a down number. The array of solid sta... | 07/14/2009 |
| 7325345 | Sign A self supporting resilient sign is assembled as a prism form a collapsed flat transport position and comprises pair of rectangular blanks of white, exterior grade pvc joined by a series of parallel, welded seams. The seams divide the blanks into a pair of panel poc... | 02/05/2008 |
| 7187295 | Sport fence The invention relates to a sports hoarding having at least one contact sensor and at least one actuator with the actuator initiating an advertising message when the sensor produces a signal as a result of an impacting body. ... | 03/06/2007 |
| 5507589 | Delineator pole A fixed or self-redressing delineator pole comprising a lower portion for insertion into a support structure and an upper portion which serves as a marker such as for a slalom gate, a parking lot, a field, or a road. The delineator pole uses an impact abs... | 04/16/1996 |
| 5189803 | Device for measuring the first down in football A device for measuring the position of a football on a football playing field has a base member adapted to be placed in juxtaposition on a yard line on the football playing field. A first elongated member to determine the distance the football is position... | 03/02/1993 |
| 5186119 | Modular marking system for athletic fields A modular marking system for permanently marking the playing field on an athletic field with removable upright visible markers containing a variable diameter spring means for attaching an above ground, upright visible marker to a ground anchor. The variab... | 02/16/1993 |
| 4841674 | Athletic numerical indicator display A portable impact-resistant athletic numerical indicator display produces highly visible numerals for observation by athletic participants and spectators. The display is provided with a series of shiftable component numeral panels which are connected to a... | 06/27/1989 |
| 4837957 | Digital number indicator A numerical display especially for use as a down marker in football games. The numbers which are displayed are painted on sets of slats which slide up and down by operation of finger levers connected to the slats by a special linkage. The slats slide behi... | 06/13/1989 |
