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Lawrence Welk, the bandleader who entertained millions of Americans over a generation of broadcasting his TV show, once received a patent: for a music-themed design of an ashtray.
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| Number | Title | Issue Date |
| 6744378 | Roadway sensor with improved insulated signal carrying wires A vehicular roadway sensor comprising a conductive elastomeric housing having a sensor wire groove and one or more signal wire in the sensor wire groove, the sensor wire groove comprised of an airgap portion and a sensing wire portion for receiving and maintaining o... | 06/01/2004 |
| 6417785 | Permanent in-pavement roadway traffic sensor system A permanent in-pavement roadway traffic sensor for sensing roadway traffic comprising an extruded conductive elastomeric housing having an elongated cavity in the lower side thereof, said elongated cavity having an upper wall and a pair of spaced lower wa... | 07/09/2002 |
| 6326902 | Residual charge-effect traffic sensor A vehicular roadway sensor comprising a conductive elastomeric housing having a sensor wire groove and one or more signal wire in the sensor wire groove, the sensor wire groove comprised of an airgap portion and a sensing wire portion for receiving and ma... | 12/04/2001 |
| 6300883 | Traffic recording system A traffic recording system for recording vehicular traffic events on a roadway having one or more lanes of traffic has a power control unit and a timer counter. Multilane roadway sensors sense roadway traffic and generates analog signals for vehicles trav... | 10/09/2001 |
