Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7802355 | Vibration table for concrete moulding machines | Erik Spangenberg | 2010-09-28 |
| 7309226 | Moulding equipment with cores for concrete casting machines | Erik Spangenberg Hansen | 2007-12-18 |
| 6832907 | Controlled moulding equipment | Erik Spangenberg | 2004-12-21 |
| 6817857 | Main frame for a concrete block molding apparatus | Erik Spangenberg | 2004-11-16 |