Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11142395 | Sanitary containers | Raymond Thomas Butler, Patricia Margaret Butler, Paul Francis Zwaan | 2021-10-12 |
| D814655 | Storage cassette | Paul Francis Zwaan, Patricia Margaret Butler, Raymond Thomas Butler | 2018-04-03 |
| D796688 | Storage cassette | Paul Francis Zwaan, Patricia Margaret Butler, Raymond Thomas Butler | 2017-09-05 |
| D712612 | Sanitary container | Raymond Thomas Butler, Patricia Margaret Butler, Paul Francis Zwaan | 2014-09-02 |
| D711060 | Sanitary container | Raymond Thomas Butler, Patricia Margaret Butler, Paul Francis Zwaan | 2014-08-12 |
| 7798358 | Waste disposal receptacle | Raymond Thomas Butler, Patricia Margaret Butler, Paul Francis Zwaan | 2010-09-21 |
| 6637184 | Flow control system for liquid fuel engine having stage-specific control of fuel flow to several groups of nozzles in the engine | — | 2003-10-28 |
| 5607727 | Composition and method for controlling brown stain in wood | Terry Highley, Elmer Schmidt, Thomas Woods | 1997-03-04 |