Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4850012 | Automated access facilities for use with key telephone systems | Sanford J. Morganstein, Herbert B. Krakau | 1989-07-18 |
| 4809321 | Busy/no-answer call completion equipment | Sanford J. Morganstein, Herbert B. Krakau, Neil F. N. Milsted, Mark D. Klecka | 1989-02-28 |