Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9995426 | Furniture swivel and furniture including the same | John Mackenzie, Lenze Elzinga, Bradley Girvin | 2018-06-12 |
| 9574704 | Furniture swivel and furniture including the same | John Mackenzie, Lenze Elzinga, Bradley Girvin | 2017-02-21 |
| 4861447 | Process for reducing corrosive impurities in sulfolane used for extracting aromatic hydrocarbons | George C. Blytas | 1989-08-29 |