Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D1033211 | Support chair for poured concrete reinforcement members | G. Douglas Hartzheim, Steven R. Wilbur | 2024-07-02 |
| D1031416 | Support chair for poured concrete reinforcement members | G. Douglas Hartzheim, Steven R. Wilbur | 2024-06-18 |
| D1027617 | Support chair for poured concrete reinforcement members | G. Douglas Hartzheim, Steven R. Wilbur | 2024-05-21 |
| D1019351 | Support chair for poured concrete reinforcement members | G. Douglas Hartzheim, Steven R. Wilbur | 2024-03-26 |
| D948993 | Support chair for poured concrete reinforcement members | G. Douglas Hartzheim, Steven R. Wilbur | 2022-04-19 |
| D944072 | Spacer wheel for poured concrete reinforcement members | G. Douglas Hartzheim, Steven R. Wilbur | 2022-02-22 |
| D939934 | Spacer wheel for poured concrete reinforcement members | G. Douglas Hartzheim, Steven R. Wilbur | 2022-01-04 |
| 11199006 | Slab bolster with improved connector system | G. Douglas Hartzheim, Steven R. Wilbur | 2021-12-14 |
| D932285 | Support chair for poured concrete reinforcement members | G. Douglas Hartzheim, Steven R. Wilbur | 2021-10-05 |
| D923775 | Hygienic face mask | G. Douglas Hartzheim, Steven R. Wilbur | 2021-06-29 |
| D891231 | Slab bolster assembly | G. Douglas Hartzheim, Steven R. Wilbur | 2020-07-28 |
| D889940 | Support chair for poured concrete reinforcement members | G. Douglas Hartzheim, Steven R. Wilbur | 2020-07-14 |
| 10604933 | Slab bolster with improved connector system | G. Douglas Hartzheim, Steven R. Wilbur | 2020-03-31 |
| 7051988 | Brace for concrete forms | Scott Shaw, Kenneth Lee, Martin E. Lancial, Clifford D. Bennett | 2006-05-30 |