Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D477151 | Armless ergonomic chair | Marcus C. Koepke, Jay R. Machael, Craig H. Schultz, Douglas A. Schroeder, Erik A. Steffensen +4 more | 2003-07-15 |
| D477164 | Chair back | Marcus C. Koepke, Erik A. Steffensen, Craig H. Schultz, Douglas A. Schroeder, Tim Coffield +1 more | 2003-07-15 |
| D476821 | Ergonomic chair | Marcus C. Koepke, Jay R. Machael, Craig H. Schultz, Douglas A. Schroeder, Erik A. Steffensen +4 more | 2003-07-08 |
| D462858 | Chair back frame | Marcus C. Koepke, Erik A. Steffensen, Craig H. Schultz, Douglas A. Schroeder, Tim Coffield +1 more | 2002-09-17 |
| D462187 | Chair | Marcus C. Koepke, Jay R. Machael, Craig H. Schultz, Douglas A. Schroeder, Erik A. Steffensen +3 more | 2002-09-03 |
| D460869 | Chair | Marcus C. Koepke, Jay R. Machael, Craig H. Schultz, Douglas A. Schroeder, Erik A. Steffensen +3 more | 2002-07-30 |