Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D567389 | Laboratory balance enclosure | Gary P. Roepke, Larry W. Nelson | 2008-04-22 |
| D538941 | Laboratory balance enclosure | Gary P. Roepke, Larry W. Nelson | 2007-03-20 |
| 4934256 | Fume hood ventilation control system | James F. Ptacek | 1990-06-19 |
| 4784763 | Water purification machine | Larry G. Hambleton, Jim Hunter | 1988-11-15 |
| D286324 | Laboratory fume hood | James D. Parks, Kermit W. Dyer, James F. Corn | 1986-10-21 |
| 4534281 | Laboratory fume hood | James D. Parks, Kermit W. Dyer | 1985-08-13 |
| 4197988 | Apparatus for reading and writing data onto a magnetic stripe and in an arcuate path | Leon J. Shaneyfelt, Jr., Charley W. Hunter | 1980-04-15 |
| 4190179 | Apparatus for storing and dispensing generally cylindrical products | Boley A. Andrews | 1980-02-26 |