Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5312224 | Conical logarithmic spiral viscosity pump | John S. Batchelder, Shawn A. Hall | 1994-05-17 |
| 5303141 | Model generation system having closed-loop extrusion nozzle positioning | John S. Batchelder, Huntington W. Curtis, Douglas S. Goodman, Franklin Gracer, George M. Koppelman +1 more | 1994-04-12 |