Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 7242295 | Security data management system A sensor unit for use in a surveillance system is provided. The sensor unit interfaces with a sensor device to receive sensor data from the sensor device. The sensor unit is configured to generate an event record based upon received sensor data. The event record is ... | 07/10/2007 |
| 7236176 | Surveillance management system A system is provided for collecting surveillance data from one or more sensor units and incorporating the surveillance data into a surveillance database. The system is configured to retrieve surveillance data from the surveillance database and perform predetermined ... | 06/26/2007 |
| 7106333 | Surveillance system A system is provided for collecting surveillance data from one or more sensor units and incorporating the surveillance data into a surveillance database. The system is configured to retrieve surveillance data from the surveillance database and perform predetermined ... | 09/12/2006 |
| 6989745 | Sensor device for use in surveillance system A sensor unit for use in a surveillance system is provided. The sensor unit interfaces with a sensor device to receive sensor data from the sensor device. The sensor unit is configured to generate an event record based upon received sensor data. The event record is ... | 01/24/2006 |