Issued Patents 1982
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4363732 | Inlet and outlet baffle structure for sewage treatment tanks | Fred J. Crates, John J. Parker | 1982-12-14 |
| 4360042 | Arched conduit with improved corrugations | John J. Parker, James L. Child, Jr., Donald W. Sting | 1982-11-23 |
| 4359167 | Subterranean plastic tank | John J. Parker, Donald A. Lytle | 1982-11-16 |
| 4357190 | Method and apparatus for manufacturing non-round plastic tubing | John J. Parker, Donald W. Sting | 1982-11-02 |