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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 7330511 | Method and system for embedding device positional data in video signals A system for embedding positional data (20) in a video signal (18), the system having a mobile object (4), a positioning receiver (10) associated with the mobile object (4) for obtaining positional data (20) on the mobile ob... | 02/12/2008 |
| 7296282 | Interactive optical cards and other hand-held devices with increased connectivity A system for deriving benefits from the reception and processing of composite video signals by a hand-held device, such as a smart card. Video signals are modulated with auxiliary data creating composite video signals. The composite video signals are then transmitte... | 11/13/2007 |
| 7286188 | Method and system for enhanced modulation of video signals A method, apparatus and system for signal modulation. A plurality of pixels are selected in a pattern such that a first pixel group of the plurality of pixels is unpaired with a second pixel group of the plurality of pixels throughout the pattern in a portion of a v... | 10/23/2007 |
| 7213254 | Universal methods and device for hand-held promotional opportunities A system is described for deriving benefits from the reception and processing of composite video signals from a display device 10 by a hand-held device 12, such as a smart card, personal digital assistant (“PDA”), or mobile phone. Video signals are... | 05/01/2007 |
| 6661905 | Method for transmitting data on a viewable portion of a video signal A method of encoding data in the visible portion of a transmitted video signal without degrading display of the received video signal, and for decoding the data in the received video signal. Each group of data bits to be transmitted, referred to a data sy... | 12/09/2003 |
