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: 157 337 350 patent documents

This week's update (19/07/2024 12:00 CET):

219 431 new documents added

1 247 852 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 0241373 B1 19900816 - CURRENT SUPPLY DEVICE FOR AN X-RAY TUBE FILAMENT

Title (en)

CURRENT SUPPLY DEVICE FOR AN X-RAY TUBE FILAMENT

Publication

EP 0241373 B1 19900816 (FR)

Application

EP 87400774 A 19870407

Priority

FR 8605240 A 19860411

Abstract (en)

[origin: US4809310A] The invention pertains to a current-supplying device used to supply heating current to a filment of an X-ray tube. The current-supplying device comprises a current inverter delivering current to a load circuit in which there is an oscillating circuit, the impedance of which is made to vary.

IPC 1-7

H05G 1/20; H05G 1/34

IPC 8 full level

H05G 1/20 (2006.01); H05G 1/34 (2006.01)

CPC (source: EP US)

H05G 1/20 (2013.01 - EP US); H05G 1/34 (2013.01 - EP US)

Designated contracting state (EPC)

DE GB IT

DOCDB simple family (publication)

EP 0241373 A1 19871014; EP 0241373 B1 19900816; DE 3764292 D1 19900920; FR 2597285 A1 19871016; FR 2597285 B1 19880617; US 4809310 A 19890228

DOCDB simple family (application)

EP 87400774 A 19870407; DE 3764292 T 19870407; FR 8605240 A 19860411; US 3586787 A 19870408