Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6892502 | Space frame support structure employing weld-free, single-cast structural connectors for highway signs | David Hubbell, Robert W. Blyth | 2005-05-17 |
| 6705744 | Area lighting device using discrete light sources, such as LEDs | David Hubbell | 2004-03-16 |
| 6685154 | Connector and method for assembling structural elements together without the use of weldments | Robert W. Blyth, David Hubbell | 2004-02-03 |
| 6676279 | Area lighting device using discrete light sources, such as LEDs | David Hubbell | 2004-01-13 |