Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4285178 | Self-supporting staircase with center post consisting of individual structural elements | Gunter Holzkampfer | 1981-08-25 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4285178 | Self-supporting staircase with center post consisting of individual structural elements | Gunter Holzkampfer | 1981-08-25 |