Celebrity Inventors
Glam girl Heddy Lamar may have used her good looks to good effect on the silver screen, but she put her smarts to better use as an inventor. During World War II, she co-patented a frequency-switching system for torpedo guidance that was considered years ahead of its time.
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| Number | Title | Issue Date |
| 7104799 | Mathematics teaching tool A mathematics education apparatus comprises a base array. The base array includes a plurality of rows, with each row having ten receiving positions. The mathematics education device further comprises a plurality of number pieces that each correspond to a number, inc... | 09/12/2006 |
| 7025258 | Ball bearing actuation mechanism A ball bearing actuation mechanism includes a circular gauge wheel rotatably mounted in an interior chamber of a housing below an inlet passage and adjacent to outlet and overflow discharge openings of the housing and a curved retainer wall mounted to the housing in... | 04/11/2006 |
| 6811401 | Binary rotation teaching game The game for teaching binary mathematics includes a plurality of balls, a backboard, and a plurality of elongate members selectively connected to each other and to the backboard in non-horizontal directions. A plurality of gate sections are pivotally connected to th... | 11/02/2004 |
| 6513708 | Mathematics teaching system A mathematics teaching system for visually and physically teaching a student how to perform multiplication and division calculations in a simple to understand format. The mathematics teaching system includes a housing having a plurality of apertures align... | 02/04/2003 |
| 6315675 | Score counter for billiards game A score counter includes a bar having two spheres on two ends thereof so as to fix the bar by engaging the two spheres with relative members. A plurality of retaining members each have a score marked therein and extend from an outside of the bar. A plural... | 11/13/2001 |
| 6000725 | Lottery ticket and method of playing a lottery game A lottery ticket includes an upper edge, a lower edge, opposite side edges, and a first area located adjacent the upper edge, the first area having a first set of gaming indicia disposed thereon that form lower portions of prize symbols. A second area is ... | 12/14/1999 |
| 5971269 | Computational teaching device A teaching device comprising a group of balls, a first counter, a second counter and a tray interconnecting the first counter to the second. The first counter represents the problem to be solved, and the second counter indicates the solution to the proble... | 10/26/1999 |
| 5702102 | Score board for dart game A dart score board has tokens moveable along tracks, each track corresponding to a region of a dart board. The score board also has point-score-keeping elements, such as sets of thumbwheels. Players record the progress (status) of a dart game by moving th... | 12/30/1997 |
| 4474558 | Didactic game based on selection of the trajectories followed by balls A didactic game wherein a number of balls are allowed to roll by gravity along a guide channel on a play plate. The guide channel has bifurcations controlled by switch means provided with manual control members for selecting the trajectory of each ball an... | 10/02/1984 |
| 4430528 | Telephone call counter An apparatus and method are disclosed for counting the number of calls made by a user during a counting period. The apparatus includes a telephone having a curved handset which is displaceable approximately 90° from a rest position to a use position. Att... | 02/07/1984 |
| 4006344 | Mechanical binary number adding and subtracting apparatus A mechanical apparatus for adding or subtracting binary numbers, in a visual manner, comprises a front plate with first and second rows of ball receiving apertures formed near the plate top. Balls are introduced into these apertures in a manner representi... | 02/01/1977 |
