Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4877432 | Disposable dust bag for vacuum cleaners and the like | — | 1989-10-31 |
| 4847944 | Vacuum cleaning with powered brush roll | — | 1989-07-18 |
| 4829624 | Apparatus for producing cleaning suds | Stanley E. Grzywna, Thomas E. Baird | 1989-05-16 |