Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839913 | Shadowgraph imaging using scatter and fluorescence | Paul Bjorkholm | 1989-06-13 |
| 4825454 | Tomographic imaging with concentric conical collimator | Michael M. Johnson, Richard Mastronardi | 1989-04-25 |
| 4819256 | Radiographic sensitivity for detection of flaws and cracks | Paul Bjorkholm | 1989-04-04 |
| 4809312 | Method and apparatus for producing tomographic images | — | 1989-02-28 |
| 4799247 | X-ray imaging particularly adapted for low Z materials | Paul Bjorkholm | 1989-01-17 |