Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6249919 | Passive deodorization device | George P. Roberts, Wolfgang Clemens, Stephan Dupont, Joseph J. Hennessey, David Vergara | 2001-06-26 |
| D403758 | Housing for an odorous substance | George P. Roberts | 1999-01-05 |
| D363772 | Air treatment device enclosure | Robert G. Kopp | 1995-10-31 |
| 5378254 | Filter sensing apparatus and filter therefor | Edward C. Maly, Alireza Bemanian | 1995-01-03 |
| 5328646 | Air flow control system with replaceable cartridge | — | 1994-07-12 |
| 5148984 | Device for dispensing a vaporizable material | Robert G. Kopp | 1992-09-22 |
| 4664312 | Air freshener dispensing apparatus | — | 1987-05-12 |
| 4377399 | Air freshening device | — | 1983-03-22 |
| 4303617 | Atmospheric control apparatus | — | 1981-12-01 |