Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4236935 | Method for removing organic acid soil from surfaces | Daniel Schoenholz, Arthur W. Petersen | 1980-12-02 |
| 4193886 | Novel low temperature cleaner | Daniel Schoenholz, Arthur W. Petersen | 1980-03-18 |