...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 7114648 | Networked time-keeping system Disclosed is time keeping system for an employer. The system includes one or more time-keeping network appliances. Each of these appliances includes a small web server. The system also includes some form of employee interface which enables the employee to submit, an... | 10/03/2006 |
| 6765600 | Time recorder with a card feed rate adjustment function and time card for use in the same The present invention provides a time recorder with a card feed rate adjustment function making it possible to print data for arrival and departure times to and from a job side at a correct position within a print column by adjusting a feed rate for a time card acco... | 07/20/2004 |
| 6718117 | Method and device for keyframe-based video displaying using a video cursor frame in a multikeyframe screen A video tape recorder is operated with multiple tracks that are physically in parallel to each other and are collectively accessible as a single logical track, through selectively displaying in parallel a plurality of video keyframes. Actual play is controlled throu... | 04/06/2004 |
| 4837584 | Security time clock system System for requiring the contemporaneous application of time clock data and personal data to a time card to prevent or signal the fraudulent application of either type of data at a time which is substantially different from the other type of data, i.e., b... | 06/06/1989 |
| 4567357 | Method of and apparatus for automatic line identification for recording on employee time cards and the like This disclosure is concerned with providing automatic identification of lines of time cards and the like on which time-in, time-out and related data is to be printed or recorded, by printing distinctive marks in the data field of the card on such lines, a... | 01/28/1986 |
| 4401994 | Recorders for recording data A time cost recorder enables entry and exit transactions to be recorded at will both by a badge bearing digitally encoded machine readable identity information and by a card bearing both digitally encoded machine readable identity information in the same ... | 08/30/1983 |
| 4333085 | Time recorder A data recorder for use in processing cards and the like comprises a housing which has mounted therein electronic control system incorporating both firmware and software programs. A thermal printer and optical reading device are mounted in the housing for... | 06/01/1982 |
| 4041503 | Attendance time recorder The present invention relates to an attendance time recorder having a printing device for printing times on a data medium such as a time card. The arrangement includes a printing head adapted to support printing types and a plurality of adjacently dispose... | 08/09/1977 |