Item 20432 - APERFEIÇOAMENTOS EM TUBOS DE VACUO

Open original Digital object

Identity area

Reference code

0.1 - Acervo Histórico de patentes do INPI-20432

Title

APERFEIÇOAMENTOS EM TUBOS DE VACUO

Date(s)

  • 28/12/1922 (Creation)

Level of description

Item

Extent and medium

application/pdf

Context area

Name of creator

Repository

Content and structure area

Scope and content

APERFEIÇOAMENTOS EM TUBOS DE VÁCUO

Conditions of access and use area

Conditions governing access

Domínio público

Language of material

  • pt-br

Allied materials area

Existence and location of originals

191922020432

Access points

Subject access points