首页
产品
黄页
商标
征信
会员服务
注册
登录
全部
|
企业名
|
法人/股东/高管
|
品牌/产品
|
地址
|
经营范围
发明名称
Telephone signaling system
摘要
申请公布号
US2107154(A)
申请公布日期
1938.02.01
申请号
US19360068254
申请日期
1936.03.11
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
KING RALPH E.
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
主权项
地址
您可能感兴趣的专利
CATHODE-RAY TUBE FOR POLYCHROMATIC DISPLAY TYPE LIGHT SOURCE
SYNCHROSERVO SYSTEM
AUTOMATIC DAZZLE-RESISTANT MIRROR DEVICE
Method for fabricating a solid-state imaging device using photoconductive film
Heat-absorbent panel for solar energy and sloping roof composed of such panels
Servo operated fluoroscopic table
Ultrasonic end-capping of beta''-alumina tubes
Pre-grown turf and manufacturing of pre-grown turf
Removal method for removable closure member for bearing units
Sonic logging tool
Fast starting cold shield cooling circuit for superconducting generators
Brightness enhancement of positron sources
Spunlike yarns
Method of coating titanium and its alloys
Method for molding ophthalmic lenses
Ceramic honeycomb filter
Interface device for the entry of data into an instrument of small volume responsive to body movement
LAMINATED CONDENSER
CIRCUIT FOR OPERATING SELF-HOLDING TYPE ELECTROMAGNETIC RELAY
PLATE-FORME MARINE SEMI-SUBMERSIBLE
