Issued Patents 2020
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D891231 | Slab bolster assembly | John H. Gilner, G. Douglas Hartzheim | 2020-07-28 |
| D889940 | Support chair for poured concrete reinforcement members | John H. Gilner, G. Douglas Hartzheim | 2020-07-14 |
| 10604933 | Slab bolster with improved connector system | John H. Gilner, G. Douglas Hartzheim | 2020-03-31 |