GPI coverage and content

You can use Global Patent Index (GPI) to carry out detailed searches in the EPO's worldwide bibliographic (DOCDB), legal event (INPADOC) and full-text data sets, and download or visualise the search results for statistical analysis.

Current content: 159 679 824 patent documents

This week's update (08/11/2024 12:00 CET):

164 112 new documents added

576 445 documents amended

GPI key values

Run regular monitoring (e.g. monthly or quarterly) of technical areas or companies

Use built-in charts to visualise technical trends and patenting activity of companies

Choose the data you want to see and download to focus on what you are interested in

Run data quality assessments to measure the risk of incomplete search results

EP 0724281 A2 19960731 - Klystron

Title (en)

Klystron

Title (de)

Klystron

Title (fr)

Klystron

Publication

EP 0724281 A2 19960731 (EN)

Application

EP 96300549 A 19960126

Priority

KR 19950001735 A 19950128

Abstract (en)

A klystron includes magnets that produce a magnetic field for preventing dispersion of the electron beams (18). The magnets are arranged in two ring-shaped groups (14,16) on around the cathode structure and the other around the anode structure. The magnets in each group are evenly spaced and have their poles at their radially inwardly and outwardly directed faces. <IMAGE>

IPC 1-7

H01J 23/087; H01J 25/10; H01J 23/20

IPC 8 full level

H01J 23/20 (2006.01); H01J 23/08 (2006.01); H01J 23/087 (2006.01); H01J 25/10 (2006.01); H03B 9/04 (2006.01)

CPC (source: EP KR)

H01J 23/08 (2013.01 - KR); H01J 23/087 (2013.01 - EP); H01J 25/10 (2013.01 - EP)

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

EP 0724281 A2 19960731; EP 0724281 A3 19980902; CN 1135650 A 19961113; JP H08264127 A 19961011; KR 100197677 B1 19990615; KR 960030299 A 19960817

DOCDB simple family (application)

EP 96300549 A 19960126; CN 96101219 A 19960128; JP 1317996 A 19960129; KR 19950001735 A 19950128