| 7841666 |
Back support structure |
Johann Burkhard Schmitz, Claudia Plikat, Carola Zwick, Roland Zwick |
2010-11-30 |
| 7425037 |
Tilt chair and methods for the use thereof |
Johann Burkhard Schmitz, Claudia Plikat, Carola Zwick, Roland Zwick, John F. Aldrich +3 more |
2008-09-16 |
| 7419222 |
Support member for a seating structure |
Johann Burkhard Schmitz, Claudia Plikat, Carola Zwick, Roland Zwick, Chad Aerts +1 more |
2008-09-02 |
| 7249802 |
Back support structure |
Johann Burkhard Schmitz, Claudia Plikat, Carola Zwick, Roland Zwick, Chad Aerts +5 more |
2007-07-31 |
| 7213886 |
Modular tilt housing for a seating structure |
Johann Burkhard Schmitz, Claudia Plikat, Carola Zwick, Roland Zwick, John F. Aldrich +1 more |
2007-05-08 |
| 7213880 |
Control device for an adjustable seating structure |
Johann Burkhard Schmitz, Claudia Plikat, Carola Zwick, Roland Zwick |
2007-05-08 |
| D494792 |
Back for a seating structure |
Johann Burkhard Schmitz, Claudia Plikat, Carola Zwick, Roland Zwick |
2004-08-24 |
| D490994 |
Task chair |
Johann Burkhard Schmitz, Claudia Plikat, Carola Eva Marianne Zwick, Roland Rolf Otto Zwick |
2004-06-08 |
| D471370 |
Task chair |
Burkhard Schmitz, Claudia Plikat, Carola Eva Marianne Zwick, Roland Rolf Otto Zwick |
2003-03-11 |