Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9890069 | Glass manufacturing apparatus and methods | Memduh Volkan Demirbas, Ralph Alfred Langensiepen, David Myron Lineman, Randy Dean Ziegenhagen | 2018-02-13 |
| 9725349 | Glass manufacturing apparatus and methods | Memduh Volkan Demirbas, Ralph Alfred Langensiepen, David Myron Lineman, Randy Dean Ziegenhagen | 2017-08-08 |