Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11473284 | Intelligent, data gathering and communicating portable restrooms | Kenneth V. Schomburg | 2022-10-18 |
| 10822784 | Intelligent, data gathering and communicating portable restrooms | Kenneth V. Schomburg | 2020-11-03 |
| 10066379 | Intelligent, data gathering and communicating portable restrooms | Kenneth V. Schomburg | 2018-09-04 |
| 7975325 | Portable toilet | — | 2011-07-12 |
| D578656 | Portable toilet | — | 2008-10-14 |
| 6327719 | Portable restroom having molded base assembly with internal tank | Douglas E. Lobertmann, Daniel J. Koughan, Richard E. Eliasen, Todd Hilde | 2001-12-11 |
| D447814 | Portable restroom | Darrin M. Swagel, Paul A. Pilosi, Micah T. Somers, Daniel J. Koughan, Douglas E. Loebertmann +1 more | 2001-09-11 |
| D444570 | Portable restroom | Paul A. Pilosi, Darrin M. Swagel, Daniel J. Koughan, Dean M. Carstens, Douglas E. Loebertmann +2 more | 2001-07-03 |
| D357543 | Base for a portable building | Randy R. Zenner, Douglas E. Loebertmann | 1995-04-18 |
| D356851 | Toilet waste tank | Douglas W. Hart, Douglas E. Loebertmann | 1995-03-28 |
| D354142 | Portable restroom | George E. McNamara, Phillip R. Juaire, Douglas W. Hart, Douglas E. Loebertmann, John E. Paul | 1995-01-03 |
| D337831 | Portable restroom | George E. McNamara, Randy R. Zenner | 1993-07-27 |
| 5185683 | Suspension arm mounting assembly | Gary R. Oberg | 1993-02-09 |
| D297114 | Paint applicator or similar article | Warren J. Walsh | 1988-08-09 |
| D296763 | Paint applicator or similar article | Warren J. Walsh | 1988-07-19 |
| D265826 | Electric cultivator | L. Ralph Sorge, Robert J. Tiedemann | 1982-08-17 |
| 4293041 | Power cultivator with debris excluding barrier and scraper | Robert C. Comer | 1981-10-06 |