Inventor
BUETTNER GERHARD
16 patents
⚠️ This page may combine multiple inventors who share the name “BUETTNER GERHARD”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SIEMENS AG
8 patentsUS4783815ANov 8, 1988
Manufacturing miniature hearing aid having a multi-layer circuit arrangement
SIEMENS AG94 citations95
US4638125AJan 20, 1987
Hearing aid with a housing to be worn behind the ear
SIEMENS AG64 citations95
US4947439AAug 7, 1990
Hearing aid comprising a contact spring arrangement
SIEMENS AG48 citations92
US4941180AJul 10, 1990
Hearing aid with a contact spring configuration
SIEMENS AG37 citations92
US4783816ANov 8, 1988
Hearing aid to be worn behind the ear having battery and volume control facing in opposite directions
SIEMENS AG31 citations92
US4710961ADec 1, 1987
Miniature hearing aid having a bindable multi-layered amplifier arrangement
SIEMENS AG49 citations92
US4354065AOct 12, 1982
Miniature hearing aid
SIEMENS AG47 citations92
US4831655AMay 16, 1989
Hinge for a hearing aid cover
SIEMENS AG21 citations81
BAYER AG
5 patentsUS4321204AMar 23, 1982
Preparation of certain 2-methyl-2,3-dihydro-benzofuran-7-ols
BAYER AG7 citations69
US4243584AJan 6, 1981
Monoazo dyestuffs containing diazo component substituted by disulfimide and trifluoromethyl groups
BAYER AG2 citations62
US4383126AMay 10, 1983
Preparation of monoalkyl ethers of hydroxyphenols
BAYER AG2 citations57
US4647676AMar 3, 1987
Process for the isolation of 2,2-dimethyl-7-hydroxy-coumaran
BAYER AG0 citations47
US4486611ADec 4, 1984
Isolation of dihydroxybenzene-monoethers from reaction mixtures
BAYER AG0 citations47