DE117137C - - Google Patents

Info

Publication number
DE117137C
DE117137C DENDAT117137D DE117137DA DE117137C DE 117137 C DE117137 C DE 117137C DE NDAT117137 D DENDAT117137 D DE NDAT117137D DE 117137D A DE117137D A DE 117137DA DE 117137 C DE117137 C DE 117137C
Authority
DE
Germany
Prior art keywords
ruler
aid
same
book
shows
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
DENDAT117137D
Other languages
German (de)
English (en)
Publication of DE117137C publication Critical patent/DE117137C/de
Active legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L7/00—Straightedges
    • B43L7/02—T-squares and other similar squares

Landscapes

  • Drawing Aids And Blackboards (AREA)
DENDAT117137D Active DE117137C (US20100154141A1-20100624-C00001.png)

Publications (1)

Publication Number Publication Date
DE117137C true DE117137C (US20100154141A1-20100624-C00001.png)

Family

ID=386423

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT117137D Active DE117137C (US20100154141A1-20100624-C00001.png)

Country Status (1)

Country Link
DE (1) DE117137C (US20100154141A1-20100624-C00001.png)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2923061A (en) * 1953-12-31 1960-02-02 Gregory S Dolgorukov Drawing instrument
WO1984003863A1 (en) * 1983-03-26 1984-10-11 David Charles Lambert Griew Drawing aid

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2923061A (en) * 1953-12-31 1960-02-02 Gregory S Dolgorukov Drawing instrument
WO1984003863A1 (en) * 1983-03-26 1984-10-11 David Charles Lambert Griew Drawing aid
US4669197A (en) * 1983-03-26 1987-06-02 Griew David C L Drawing aid

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