Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9016668 | Stackable barrier with connector | Marc E. Christensen, Joseph C. Mecham | 2015-04-28 |
| 8936134 | Three/four step ladder with a curve about | — | 2015-01-20 |
| 8453995 | Control barrier | Marc E. Christensen | 2013-06-04 |
| 7789585 | Control barrier with rotatable legs | Marc E. Christensen | 2010-09-07 |
| D599488 | Control barrier with rotatable legs | Marc E. Christensen | 2009-09-01 |
| 7578632 | Secure interlocking system for plastic materials | — | 2009-08-25 |
| 7540682 | Control barrier with rotatable legs | Marc E. Christensen | 2009-06-02 |
| 7526841 | Indented female blow-molded connector and male connector and method | — | 2009-05-05 |
| 7448824 | Traffic barricade having interchangeable parts | — | 2008-11-11 |
| D569992 | Traffic barrier | Marc E. Christensen | 2008-05-27 |
| 7275289 | Indented female blow-molded connector and male connector and method | — | 2007-10-02 |
| 7234780 | Indented female blow-molded connector and male connector and method | — | 2007-06-26 |
| 6190600 | Circular interconnect | — | 2001-02-20 |
| 6102156 | Blow molded articles and method of making | — | 2000-08-15 |
| D401360 | Gate | Raymond C. Confer | 1998-11-17 |