Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4945676 | Method and apparatus for supplementing the feed solution of hydrocultures with desalinated water | Franz Penningsfeld | 1990-08-07 |
| 4820033 | Solar mirror apparatus | — | 1989-04-11 |
| 4681453 | Optoelectronic comparison apparatus for structures on plane surfaces or for planar structures | — | 1987-07-21 |
| 4671663 | Optical fault seeking apparatus | — | 1987-06-09 |
| 4660929 | Retroreflector | — | 1987-04-28 |
| 4632546 | Grooved surface defect detection apparatus | Christoph Schenk | 1986-12-30 |
| 4625666 | Optical thread breakage monitoring apparatus for tufting machines | — | 1986-12-02 |
| 4538536 | Optical apparatus for monitoring for thread breakage | — | 1985-09-03 |
| 4500208 | Apparatus for seeking faults in wide material webs | — | 1985-02-19 |
| 4464014 | Retroreflectors, especially for beam scanning applications and beam scanning apparatus incorporating such retroreflectors | Gunter Fetzer, Hermann Winterer | 1984-08-07 |
| 4431309 | Monitoring apparatus | Dieter Ross, Siegfried Mankel | 1984-02-14 |
| 4310250 | Apparatus for monitoring for faults in translucent strip material | Klaus Ostertag | 1982-01-12 |
| 4310756 | Light grid arrangement using cyclically switched semiconductor light sources | Gunter Fetzer | 1982-01-12 |
| 4306813 | Apparatus for determining faults in strip material | — | 1981-12-22 |
| 4302105 | Detection apparatus for finding holes in webs | — | 1981-11-24 |
| 4295743 | Apparatus for determining faults in strip material | — | 1981-10-20 |
| 4293776 | Banknote condition monitoring apparatus | Siegfried Mankel | 1981-10-06 |
| 4291987 | Hole seeking apparatus | Siegfried Mankel | 1981-09-29 |
| 4248537 | Optical apparatus for determining the light exit angle from a material strip illuminated by a light bead | — | 1981-02-03 |
| 4227091 | Optical monitoring apparatus | — | 1980-10-07 |
| 4200397 | Apparatus for distinguishing between predetermined ranges of angles at which light rays leave a surface | Klaus Hartmann, Heinz Henneberger | 1980-04-29 |
| 4196962 | Light conducting rods with linear convex mirror arrays | — | 1980-04-08 |
| 4181398 | Optical apparatus | — | 1980-01-01 |