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: 159 823 134 patent documents

This week's update (15/11/2024 12:00 CET):

143 307 new documents added

1 003 170 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 0686984 A1 19951213 - Demagnetisation of materials

Title (en)

Demagnetisation of materials

Title (de)

Entmagnetisierung von Werkstoffen

Title (fr)

Démagnétisation des matériaux

Publication

EP 0686984 A1 19951213 (EN)

Application

EP 95303955 A 19950608

Priority

GB 9411594 A 19940609

Abstract (en)

A method of at least partially demagnetising a workpiece comprises applying a magnetic field with a first polarity to the workpiece for a first duration. Thereafter, magnetic fields are applied with successively reversed polarities and shorter durations. <IMAGE>

IPC 1-7

H01F 13/00

IPC 8 full level

H01F 13/00 (2006.01)

CPC (source: EP)

H01F 13/006 (2013.01)

Citation (search report)

[X] US 3895270 A 19750715 - MADDOX HARRY L
[X] EP 0243564 A2 19871104 - MANNESMANN AG [DE]
[X] PATENT ABSTRACTS OF JAPAN vol. 010, no. 279 (E - 439) 20 September 1986 (1986-09-20)

Designated contracting state (EPC)

DE FR GB IT SE

DOCDB simple family (publication)

EP 0686984 A1 19951213; GB 9411594 D0 19940803; JP H08172014 A 19960702

DOCDB simple family (application)

EP 95303955 A 19950608; GB 9411594 A 19940609; JP 16717995 A 19950609