Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5239290 | Magnetic cores for saturable core measuring devices and methods of manufacturing such cores | — | 1993-08-24 |
| 5206065 | Methods, apparatus and devices relating to magnetic markers for elongated hidden objects | John B. Rippingale | 1993-04-27 |
| 5173139 | Method for providing magnetic markers on elongated hidden objects | John B. Rippingale | 1992-12-22 |
| 5138761 | Method of manufacturing magnetic detection apparatus | — | 1992-08-18 |
| 5136245 | Magnetic detection apparatus with sensors mounted on channel or angle cantilever support | — | 1992-08-04 |
| 5122750 | Methods employing permanent magnets for marking, locating, tracing and identifying hidden objects such as buried fiber optic cables | John B. Rippingale, Charles R. Upton, Bradley L. Osman | 1992-06-16 |
| 5114517 | Methods, apparatus and devices relating to magnetic markers for elongated hidden objects | John B. Rippingale | 1992-05-19 |
| 5097211 | Magnetic detection appartaus with plastic housing and sound-transmissive handle | — | 1992-03-17 |
| 5017873 | Methods and apparatus employing permanent magnets for marking, locating, tracing and identifying hidden objects such as buried fiber optic cables | John B. Rippingale, Charles R. Upton, Bradley L. Osman | 1991-05-21 |
| 5006806 | Methods and apparatus employing permanent magnets for marking, locating, tracing and identifying hidden objects such as burried fiber optic cables | John B. Rippingale, Charles R. Upton, Bradley L. Osman | 1991-04-09 |
| 4839623 | Magnetic core blanks of magnetically permeable sheet material | Mohammed M. Hamzezadeh | 1989-06-13 |
| 4839624 | Magnetic cores | — | 1989-06-13 |
| 4803773 | Method of making magnetic cores | — | 1989-02-14 |
| 4747207 | Manufacture of magnetic cores from blanks of magnetically permeable sheet material | Mohammed M. Hamzezadeh | 1988-05-31 |
| 4590425 | Magnetic detector apparatus with excitation conductors connected in series via sensor housing | — | 1986-05-20 |
| 4539522 | Magnetic detector apparatus with liquid-supported, conductive, sensor-support tube | — | 1985-09-03 |
| 4388592 | Multiaxis magnetometer apparatus with orthogonally disposed rectangular housings for mounting separate sensor assemblies | — | 1983-06-14 |
| 4258320 | Apparatus and method employing foam sleeves for supporting magnetic sensors in a tubular housing | — | 1981-03-24 |
| D255552 | Magnetic locator | — | 1980-06-24 |