ELECTRONIC DEVICE FOR TESTING A STUDENT'S KNOWLEDGE,申请号GB19750052640-传众专利搜索

首页产品黄页商标征信

会员服务注册登录

法人/股东/高管

发明名称	ELECTRONIC DEVICE FOR TESTING A STUDENT'S KNOWLEDGE
摘要
申请公布号	GB1514790(A)	申请公布日期	1978.06.21
申请号	GB19750052640	申请日期	1975.12.23
申请人	CLARK S	发明人
分类号	G09B7/08;(IPC1-7):G09B7/08	主分类号	G09B7/08
代理机构		代理人
主权项
地址

您可能感兴趣的专利

RUNDBALLENPRESSE

VORRICHTUNG ZUM ZERKLEINERN BZW. REGENERIEREN VON ABFAELLEN AUS THERMOPLASTISCHEM KUNSTSTOFF

FLACHDRUCKMATRIZE UND VERFAHREN ZUR HERSTELLUNG EINER TROCKENFLACHDRUCKFORM UNTER VERWENDUNG DER FLACHDRUCKMATRIZE

Self propelled track laying machine - cleans and relays ballast with plough, conveyor chain, sieve and accumulator

Silage block cutter and conveyor - has vertically movable spade mounted on front of frame and distributor with rotary vertical tines

VERFAHREN UND VORRICHTUNG ZUM HERSTELLEN VON WAELZLAGERRINGEN AUS KUNSTSTOFF

DREHMASCHINEN - REVOLVER

Ultrasonic control system for gambling machine - has keyboard with buttons for starting and stopping machine

Cat toilet with open-topped bowl - with bottom sloping down towards all side walls

Electrostatic precipitator for dust laden gases - has water cooled electrodes in pairs of groups

Open:end spun core yarn - has core filaments passed into spinning chamber to be drawn out with spun staple fibres

Water sports appliance with ski shaped floats - has two guide surfaces with elements fastened in groups on retainer fittings

Car seat, with adjustable padded back rest - has inflatable air cushions manually adjusted by individual ball pumps

Butterfly valve with circular valve plate - has hydraulic or pneumatic inflatable seal ring located in valve body

Safety flashers for public transport vehicle - has lights with power supply linked to vehicle alternator output to be operated when door is opened when engine is running

Circular plate for anchor plug - has two screw nuts to mount fitting onto concrete wall

Free radical catalysts, esp. for unsatd. polyesters - are prepd. by reacting a metal alkyl or aryl, a diaryl ketone and water, an acid halide, an anhydride or a silane

Charge meters for heat supply systems - have heat quantity and thermal power meters with continuous and peak consumption measured and limits which can be set

Tile packing carton box - has stamped cuts forming surfaces pressed inwards after filling to take up internal clearance

Bailing control for inflatable liferaft - has folding bailer linked to venting pipe with two non return valves