Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5067102 | Method and apparatus for displaying and editing mathematical expressions in textbook format | — | 1991-11-19 |
| 4885714 | Calculator having a user-accessible object stack for the uniform application of mathematical functions and logical operations to a multiplicity of object types | Laurence W. Grodd, Paul J. McClellan, Robert Miller, Charles M. Patton, William C. Wickes | 1989-12-05 |