Process for the production of prismatic alkaline accumulator cells
DE4325464A1
Accumulator with plastic housing
DE4301549C1
Gas-tight metal hydride battery
DE4228315A1
Gas-tight alkaline accumulator
DE4205814A1
ISDN telephone exchange system - has D channel protocol adaptor for connecting exchange and caller via ISDN base connection and network terminal
DE4115267A1
Miniature button type electrical battery - has built-in sprung contact that separates when internal gas pressure builds up to threshold value
DE4029503A1
Safely over-(dis)charged and hermetic nickel hydride cells - uses additive of hydrogen catalysts e.g. raney metal in negative electrode mass and positive metal oxide electrode
DE4021206A1
Two=way communication system - provides link between door located microphone and loudspeaker and telephone to serve as entry phone
DE3939791A1
Rechargeable pocket torch allowing mains recharging - uses contact pins inserted in mains plug after removal of lamp stage
DE3921940A1
Switching circuitry for telephone subscriber party line - has current supply circuit using exchange battery and call current recognition circuit
DE3917296A1
Electric hybrid circuit for telephone installations - has electronic changeover switch for transmitter and receiver coupling to two=wire line
DE3917075A1
Electronic equipment for acoustic room monitoring - uses programmable circuitry powered by two wire supply in conjunction with telephone system
DE3824222A1
GAS-TIGHT SEALED BATTERY, IN PARTICULAR NICKEL-CADIUM-BATTERY BATTERY
DE3743865A1
TELECOMMUNICATIONS DEVICE, ESPECIALLY TELEPHONE EXTENSION
DE3525061A1
Charging network
DE3505558A1
Galvanic element with alkaline electrolyte, especially nickel-cadmium battery
DE3423297A1
Electromechanical counter
DE3234004A1
Memory chip for microprocessors
DE3150944A1
Gas- and liquid-tight storage battery and method of producing it
DE3108794A1
Electronic tone transmitter, especially for door installations
