Issued Patents All Time
Showing 26–46 of 46 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5367802 | Picture frame | — | 1994-11-29 |
| 5211832 | Process for producing electrically impervious anodized films on valve metals and product thereof | Mathew Cooper | 1993-05-18 |
| 5185075 | Surface treated titanium/titanium alloy articles and process for producing | Brian Melody | 1993-02-09 |
| 4967499 | Picture frame assembly | — | 1990-11-06 |
| 4815898 | Roof supports | Egon Wojaczek, Klaus Seeberger, Wolfgang Stradtmann | 1989-03-28 |
| 4755084 | Multi-part roof-contacting structures of mine roof supports | Bernd Peters, Walter Weirich | 1988-07-05 |
| 4600340 | Mine roof support unit | — | 1986-07-15 |
| 4451181 | Control systems for mineral mining installations | Thomas Trumper, Walter Weirich | 1984-05-29 |
| 4449859 | Mineral mining installation | Gunter Terhorst, Karl-Heinz Plester, Friedrich Eggenstein | 1984-05-22 |
| 4427321 | Mineral mining installation | Walter Weirich, Kunibert Becker | 1984-01-24 |
| 4411461 | Bumper guards | — | 1983-10-25 |
| 4391181 | Hydraulic control systems for mining apparatus | Walter Weirich, Michael Dettmers, Kunibert Becker | 1983-07-05 |
| 4379424 | Devices for limiting the stroke of a hydraulic ram used in mining apparatus | Karl-Heinz Plester, Friedrich Eggenstein, Gunter Terhorst | 1983-04-12 |
| 4378027 | Control unit for an electro-hydraulic roof support control arrangement | Walter Weirich | 1983-03-29 |
| 4338320 | Esters of 6'-hydroxycinchonine, and a method of treating arrythmia with them | LaVerne D. Small | 1982-07-06 |
| 4307981 | Mineral mining installation | Walter Weirich, Kunibert Becker | 1981-12-29 |
| 4306822 | Hydraulic control means | Walter Weirich | 1981-12-22 |
| 4293247 | Seals for mine roof supports | Norbert Holken | 1981-10-06 |
| 4231685 | Roof support unit | Lubomir Plevak | 1980-11-04 |
| 4217067 | Mine roof support assembly | Gunter Lagodka, Kunibert Becker, Gerd Dunkel | 1980-08-12 |
| 4191498 | Hydraulic roof support control system | Walter Weirich | 1980-03-04 |