Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6516922 | Self-generating elevator emergency power source | Gregory Shadkin | 2003-02-11 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6516922 | Self-generating elevator emergency power source | Gregory Shadkin | 2003-02-11 |