Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 4575086 | Trackball device The trackball device comprises cylindrical first and second supports. First and second code wheels are respectively coupled to the supports and are rotatable therewith. First and second reader means are respectively associated with the first and second co... | 03/11/1986 |
| 4562347 | Input device featuring both trackball and mouse capability An input apparatus for use with a computer, including a housing having a top aperture and a bottom aperture, a spherical member supported in the housing so that a portion thereof protrudes through the top and bottom apertures, and encoding means for trans... | 12/31/1985 |
| 4538476 | Cursor control assembly An improved ball-type cursor control assembly is provided for controlling the position of a cursor or the like within the field of a video display. The control assembly comprises two orthogonally spaced rotatable traction wheels for supporting the ball at... | 09/03/1985 |
| 4493992 | Adapter circuit for trackball device An adapter includes a program-controlled microprocessor provided with input means adapted to be coupled to the output of a trackball-type position control device, output terminals and selection means for selectively conditioning the processor for operatio... | 01/15/1985 |
| 4404865 | Trackball device A trackball device includes a housing containing a plurality of rotatable supports and a ball seated thereon with a portion of the ball projecting through an opening in the housing for manual rotation by a user. First and second ones of the supports compr... | 09/20/1983 |
| 4371813 | Circuit arrangement for moving a marker over the picture screen An arrangement for displacing a marker on the picture screen of a display device, in which, to shift the marker rapidly as well as exactly, the marker is displaced by means of a rotary pulse generator, the direction of rotation determining the direction o... | 02/01/1983 |
| 4254416 | Variable size character generator A system for displaying, performing positioning, sizing, and performing supportive composition functions for newspaper advertising layout in which characters and symbols are displayed with a height and width closely approximating the height and width of t... | 03/03/1981 |
| 4167729 | Apparatus for obtaining multi-spectral signatures A multispectral data classification system has an improved apparatus for the identification of training samples of multispectral image data useful in the computation of spectral signatures. A set of multispectral image data is displayed on a user-interactive d... | 09/11/1979 |
