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: 155 519 367 patent documents

This week's update (03/05/2024 12:00 CET):

123 361 new documents added

1 354 331 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 0501520 A3 19930616 - TONE SCALE-/CHARD INDICATOR

Title (en)

TONE SCALE-/CHARD INDICATOR

Publication

EP 0501520 A3 19930616 (DE)

Application

EP 92103522 A 19920229

Priority

DE 4106571 A 19910301

Abstract (en)

[origin: EP0501520A2] In a tone scale/chord indicator, it is envisaged to design a movable part as a slide (14) which is displaceable in relation to a basic part (12) and to reproduce with fields (32) in a window (22) of the basic part tone scales assigned to the respective strings of the instrument. <IMAGE>

IPC 1-7

G10G 1/02

IPC 8 full level

G10G 1/02 (2006.01)

CPC (source: EP)

G10G 1/02 (2013.01)

Citation (search report)

[X] GB 2119153 A 19831109 - THORBURN DUNCAN GLEN
[X] US 3668967 A 19720613 - MALIS ALBERT
[X] US 3894465 A 19750715 - SIMMONS LOUIS E
[X] WO 8401845 A1 19840510 - DUFFY ANTHONY MICHAEL
[A] FR 1242827 A 19601007
[A] US 3554074 A 19710112 - RICKEY JAMES C
[A] FR 2133273 A5 19721124 - RENAULT JACQUES

Designated contracting state (EPC)

AT DE ES FR GB IT

DOCDB simple family (publication)

EP 0501520 A2 19920902; EP 0501520 A3 19930616; DE 4106571 A1 19920903; DE 4106571 C2 19921203

DOCDB simple family (application)

EP 92103522 A 19920229; DE 4106571 A 19910301