Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4990827 | Micro secondary electron multiplier | Wolfgang Ehrfeld, Herbert Oskar Moser | 1991-02-05 |
| 4872888 | Microporous membrane filter and method of producing same | Wolfgang Ehrfeld, Peter Hagmann, Jurgen Mohr | 1989-10-10 |
| 4797211 | Cross flow microfilter | Wolfgang Ehrfeld | 1989-01-10 |
| 4784935 | Method of producing a passive optical device including at least one reflection grating | Wolfgang Ehrfeld | 1988-11-15 |
| 4703559 | Method for producing connecting elements for electrically joining microelectronic components | Wolfgang Ehrfeld, Peter Hagmann, Erwin Becker | 1987-11-03 |
| 4698285 | Method for producing deep-etch, X-ray lithography masks | Wolfgang Ehrfeld, Asim Maner | 1987-10-06 |
| 4661212 | Method for producing a plurality of plate shaped microstructured metal bodies | Wolfgang Ehrfeld, Peter Hagmann, Asim Maner, Erwin Becker | 1987-04-28 |
| 4541977 | Method for producing separating nozzle elements | Erwin Becker, Wilhelm Bier, Wolfgang Ehrfeld | 1985-09-17 |
| 4493753 | Method for producing separating nozzle elements for the separation of fluid mixtures | Erwin Becker, Wolfgang Ehrfeld, Hans Betz, Anton Heuberger | 1985-01-15 |