Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4991239 | Bulkheads for swimming pools | John F. Corna | 1991-02-12 |
| 4501100 | Method and apparatus for making swimming pools | John F. Corna | 1985-02-26 |
| 4400834 | Swimming pool walls with gutter and conduit construction | John F. Corna | 1983-08-30 |
| 4388458 | Use of ultrasonic energy to improve nitrocellulose purification | Robert Baumann, Irwin Spiess | 1983-06-14 |
| 4380837 | Method and apparatus for controlling the flow in swimming pool gutters | John F. Corna | 1983-04-26 |
| 4365059 | Nitration of cellulose | Robert Baumann, Irwin Spiess | 1982-12-21 |
| 4334060 | Reactor for the gas phase nitration of cellulose | — | 1982-06-08 |
| 4316571 | Wall construction method for swimming pools | John F. Corna | 1982-02-23 |