DE315612C - - Google Patents

Info

Publication number
DE315612C
DE315612C DENDAT315612D DE315612DA DE315612C DE 315612 C DE315612 C DE 315612C DE NDAT315612 D DENDAT315612 D DE NDAT315612D DE 315612D A DE315612D A DE 315612DA DE 315612 C DE315612 C DE 315612C
Authority
DE
Germany
Prior art keywords
writing device
retaining straps
ruler
indexed
tensioned
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
DENDAT315612D
Other languages
German (de)
English (en)
Publication of DE315612C publication Critical patent/DE315612C/de
Active legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B21/00—Teaching, or communicating with, the blind, deaf or mute
    • G09B21/001—Teaching or communicating with blind persons
    • G09B21/002—Writing aids for blind persons

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Physics & Mathematics (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
DENDAT315612D Active DE315612C (OSRAM)

Publications (1)

Publication Number Publication Date
DE315612C true DE315612C (OSRAM)

Family

ID=568362

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT315612D Active DE315612C (OSRAM)

Country Status (1)

Country Link
DE (1) DE315612C (OSRAM)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2852862A (en) * 1955-06-21 1958-09-23 Orville M Craig Letter writing aid for the blind

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2852862A (en) * 1955-06-21 1958-09-23 Orville M Craig Letter writing aid for the blind

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