Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9044102 | Spring core having border wire with generally rectangular cross-section | David S. Haffner, John E. Hull, Darrell A. Richmond, Thomas W. Wells | 2015-06-02 |
| 8490232 | Spring core having border wire with generally rectangular cross-section | David S. Haffner, John E. Hull, Darrell A. Richmond, Thomas W. Wells | 2013-07-23 |
| 8332974 | Bedding foundation having border wire with generally rectangular cross-section | David S. Haffner, John E. Hull, Darrell A. Richmond, Thomas W. Wells | 2012-12-18 |
| 8327475 | Bedding foundation having nestably stackable spring assembly welded to border wire with generally rectangular cross-section | David S. Haffner, John E. Hull, Darrell A. Richmond, Thomas W. Wells | 2012-12-11 |
| 5515294 | Method and apparatus for testing coiled materials | Henry G. Mohr, Daniel W. Martin, Henry Zapletal | 1996-05-07 |