Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866886 | Textured lapping plate and process for its manufacture | — | 1989-09-19 |
| 4850157 | Apparatus for guiding the flow of abrasive slurry over a lapping surface | — | 1989-07-25 |
| 4821461 | Textured lapping plate and process for its manufacture | — | 1989-04-18 |
| 4784295 | Slurry dispensing system having self-purging capabilities | — | 1988-11-15 |
| 4559743 | Method for calibrating a machining sensor | Alan G. Kracke, Douglas J. Hennenfent | 1985-12-24 |
| 4536992 | Precision lapping system | Douglas J. Hennenfent, Alan G. Kracke | 1985-08-27 |
| 4517041 | Method for attaching a workpiece to a workpiece carrier | Douglas J. Hennenfent, Alan G. Kracke | 1985-05-14 |
| 4457114 | Workpiece carrier | Douglas J. Hennenfent, Alan G. Kracke | 1984-07-03 |
| 4297781 | Method of aligning a precision grinding wheel assembly | Douglas J. Hennenfent, Robert A. Johnson | 1981-11-03 |
| 4279102 | Method of manufacturing narrow track ferrite head cores | Douglas J. Hennenfent, Robert A. Johnson | 1981-07-21 |
| 4236355 | Precision grinding wheel mount | Douglas J. Hennenfent, Robert A. Johnson | 1980-12-02 |
| 4182643 | Method of forming gaps in magnetic heads | Arthur Calderon, Douglas J. Hennenfent | 1980-01-08 |