Issued Patents All Time
Showing 251–273 of 273 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5878824 | Boring tool or other device including thermal protection for an electronic component assembly and method | Rudolf Zeller, Shiu S. Ng | 1999-03-09 |
| 5767678 | Position and orientation locator/monitor | — | 1998-06-16 |
| 5764062 | Technique for establishing and recording a boring tool path using a survey reference level | — | 1998-06-09 |
| 5757190 | System including an arrangement for tracking the positional relationship between a boring tool and one or more buried lines and method | — | 1998-05-26 |
| 5726359 | Orientation sensor especially suitable for use in an underground boring device | Rudolf Zeller | 1998-03-10 |
| 5698981 | Technique for establishing at least a portion of an underground path of a boring tool | — | 1997-12-16 |
| 5633589 | Device and method for locating an inground object and a housing forming part of said device | — | 1997-05-27 |
| 5444382 | Position and orientation locator/monitor | — | 1995-08-22 |
| 5337002 | Locator device for continuously locating a dipole magnetic field transmitter and its method of operation | — | 1994-08-09 |
| 5155442 | Position and orientation locator/monitor | — | 1992-10-13 |
| 4896733 | Technique for providing an underground tunnel utilizing a powered boring device | Glen Baker, Albert W. Chau, James A. Fikse | 1990-01-30 |
| 4881083 | Homing technique for an in-ground boring device | Albert W. Chau | 1989-11-14 |
| 4867255 | Technique for steering a downhole hammer | Glen Baker, Dmitry Feldman, Shiu S. Ng, Albert W. Chau | 1989-09-19 |
| 4856600 | Technique for providing an underground tunnel utilizing a powered boring device | Glen Baker, Albert W. Chau, James A. Fikse | 1989-08-15 |
| 4821815 | Technique for providing an underground tunnel utilizing a powered boring device | Glen Baker, Albert W. Chau, James A. Fikse | 1989-04-18 |
| 4806869 | An above-ground arrangement for and method of locating a discrete in ground boring device | Albert W. Chau | 1989-02-21 |
| 4787463 | Method and apparatus for installment of underground utilities | Edward W. Geller, Mike Kirby, Tom O'Hanlon, Jim Reichman, Ken Theimer +1 more | 1988-11-29 |
| 4714118 | Technique for steering and monitoring the orientation of a powered underground boring device | Glen Baker, Albert W. Chau | 1987-12-22 |
| 4706824 | Variable sized free standing promotional display | R. Christopher Kidd, Milton J. Merl | 1987-11-17 |
| 4674579 | Method and apparatus for installment of underground utilities | Edward W. Geller, Mike Kirby, Tom O'Hanlon, Jim Reichman, Ken Theimer +1 more | 1987-06-23 |
| 4525911 | Method and apparatus for attaching blades to rotating structures | Steve S. Sisson, Olivier L. Tremoulet, Jr. | 1985-07-02 |
| 4435902 | Articulated boom water jet cutting apparatus | John H. Olsen, Stephen Michael Elkins | 1984-03-13 |
| 4363933 | Automatic navigation station identifier and monitor | — | 1982-12-14 |