Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5349518 | Method and apparatus for symbolic ladder logic programming with automatic attachment of addresses | Scott C. Zifferer | 1994-09-20 |
| 5276811 | Method for emulating programmable logic controller by exchanging information between debug program which emulates I/O devices and ladder logic program | Scott C. Zifferer | 1994-01-04 |
| 5267145 | Method and apparatus for program navigation and editing for ladder logic programs by determining which instructions reference a selected data element address | Scott C. Zifferer | 1993-11-30 |
| 5243511 | Method and apparatus for block move re-addressing in ladder logic programs | Scott C. Zifferer | 1993-09-07 |
| 5127099 | Method and apparatus for securing access to a ladder logic programming and monitoring system | Scott C. Zifferer | 1992-06-30 |
| 4991076 | Method and apparatus for creating custom displays for monitoring ladder logic programs | Scott C. Zifferer | 1991-02-05 |