Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6179104 | Self-winding cable reel | Jorg Steinmuller, Gunther Kleindopp | 2001-01-30 |
| 4790743 | Method of reducing the nox-emissions during combustion of nitrogen-containing fuels | Klaus Leikert, Klaus-Dieter Rennert | 1988-12-13 |
| 4783815 | Manufacturing miniature hearing aid having a multi-layer circuit arrangement | — | 1988-11-08 |
| 4783816 | Hearing aid to be worn behind the ear having battery and volume control facing in opposite directions | Berndt Diefenbach | 1988-11-08 |
| 4710961 | Miniature hearing aid having a bindable multi-layered amplifier arrangement | — | 1987-12-01 |
| 4647676 | Process for the isolation of 2,2-dimethyl-7-hydroxy-coumaran | Manfred Lenthe, Udo Allenbach, Karl-Friedrich Christmann | 1987-03-03 |
| 4551090 | Burner | Klaus Leikert, Sigfrid Michelfelder | 1985-11-05 |
| 4486611 | Isolation of dihydroxybenzene-monoethers from reaction mixtures | Manfred Lenthe, Udo Allenbach, Karl-Friedrich Christmann | 1984-12-04 |
| 4383126 | Preparation of monoalkyl ethers of hydroxyphenols | Artur Judat, Udo Allenbach, Manfred Lenthe | 1983-05-10 |
| 4321204 | Preparation of certain 2-methyl-2,3-dihydro-benzofuran-7-ols | Karl-Friedrich Christmann, Manfred Lenthe, Udo Allenbach | 1982-03-23 |
| 4243584 | Monoazo dyestuffs containing diazo component substituted by disulfimide and trifluoromethyl groups | Richard Sommer, Gerhard Wolfrum | 1981-01-06 |