|
DE535758C
|
|
Method for redesigning a telephone membrane for the purpose of adjustment
|
|
DE585320C
|
|
membrane
|
|
DE521989C
|
|
Method of adjusting telephone diaphragms after assembly with the magnet
|
|
DE505697C
|
|
Method of making a membrane
|
|
DE551756C
|
|
Shell-shaped membrane (spring), especially for acoustic purposes
|
|
DE525500C
|
|
Arrangement to increase the sensitivity of a membrane, especially for acoustic purposes
|
|
DE505696C
|
|
membrane
|
|
DE503827C
|
|
Membrane for acoustic purposes
|
|
DE456242C
|
|
Device for measuring low frequencies, especially the pulse rate
|
|
DE461912C
|
|
Device for measuring the frequency of pulsating movements, in particular the pulse frequency
|
|
DE455190C
|
|
Facility for cardiac examination
|
|
DE447759C
|
|
Facility for cardiac examination
|
|
DE444155C
|
|
Device for converting rotary motion into pendulum progressive motion
|
