Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6308883 | Heat insulating paper cups | Michael Schmelzer, Diana L. Penn | 2001-10-30 |
| 6139665 | Method for fabricating heat insulating paper cups | Michael Schmelzer, Diana L. Penn | 2000-10-31 |