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| Number | Title | Issue Date |
| 4644368 | Tachograph for motor vehicles The disclosed tachograph writes work data for motor vehicle work into a microprocessor-controlled EEPROM semiconductor memory mounted on a movable data card carried by the driver. A printing device prints out the content of a data card memory in the form ... | 02/17/1987 |
| 4150437 | Attendance recording system Attendance recording equipment for recording information relating to the attendance of a group of personnel. The equipment includes personnel identification recognition means for receiving a person's identification means in order to produce a signal assoc... | 04/17/1979 |
| 3942182 | Recording device A recording time clock whose housing has an orifice for insertion of a time card and another orifice in which a punched coding plate may be inserted. A reading device reads the code of perforations in the coding plate and sets a code printing wheel in the... | 03/02/1976 |
