Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11084119 | Electrode for resistance spot welding of dissimilar materials | David Yang, David R. Sigler, Blair E. Carlson, James G. Schroth | 2021-08-10 |
| 11045894 | Weld schedule for resistance spot welding of aluminum alloy workpieces | David R. Sigler | 2021-06-29 |
| 10981243 | Multi-step direct welding of an aluminum-based workpiece to a steel workpiece | David R. Sigler, Blair E. Carlson, Yelena Myasnikova | 2021-04-20 |
| 10981244 | Resistance welding electrode | Hui Wang, David R. Sigler, Blair E. Carlson, Amberlee S. Haselhuhn | 2021-04-20 |
| 10940557 | Programmable polarity module for DC resistance spot welding | David R. Sigler | 2021-03-09 |