Issued Patents 1989
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886158 | Modular center drive conveyor belt | — | 1989-12-12 |
| 4882901 | Detachable link chain | — | 1989-11-28 |
| 4871505 | Mold and process for manufacturing helical shaped items | — | 1989-10-03 |
| 4860234 | Portable keyboard operated alpha computer system with few keys and visual keystroke instructions | — | 1989-08-22 |
| 4852719 | Modular screw conveyor | — | 1989-08-01 |
| 4852055 | Forming lines in computer aided pattern generating systems | — | 1989-07-25 |
| 4847954 | Support apparatus for use in video imaging and processing of transverse fish sections | John P. Farrell, Ronald H. Burch, Mark E. Sutton, Joseph F. Scamardo, Jr. | 1989-07-18 |
| 4848259 | Electro-magnetic coupling for tow boat and barge | — | 1989-07-18 |
| 4845841 | Method and apparatus for constructing stairways | Christopher G. Greve | 1989-07-11 |
| 4832183 | Conveyor belt having insertable & selectable conveying member | — | 1989-05-23 |
| 4832187 | Modular center drive conveyor belt | — | 1989-05-23 |
| 4821872 | Lightweight modular conveyor belt | — | 1989-04-18 |
| 4815271 | Detachable link chain | — | 1989-03-28 |
| 4815270 | Detachable link chain | — | 1989-03-28 |
| 4807342 | Method for making an improved heat exchanger | — | 1989-02-28 |
| RE32880 | Rolling diaphragm metering valve | — | 1989-02-28 |