DE345507C - - Google Patents

Info

Publication number
DE345507C
DE345507C DENDAT345507D DE345507DA DE345507C DE 345507 C DE345507 C DE 345507C DE NDAT345507 D DENDAT345507 D DE NDAT345507D DE 345507D A DE345507D A DE 345507DA DE 345507 C DE345507 C DE 345507C
Authority
DE
Germany
Prior art keywords
ruler
holes
rulers
rods
frame
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
DENDAT345507D
Other languages
German (de)
English (en)
Publication of DE345507C publication Critical patent/DE345507C/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
    • B43L11/00—Non-circular-curve-drawing instruments
    • B43L11/02—Non-circular-curve-drawing instruments for drawing conic sections
    • B43L11/04—Non-circular-curve-drawing instruments for drawing conic sections for drawing ellipses
DENDAT345507D Active DE345507C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Publications (1)

Publication Number Publication Date
DE345507C true DE345507C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Family

ID=573782

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT345507D Active DE345507C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Country Status (1)

Country Link
DE (1) DE345507C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4601108A (en) * 1984-10-25 1986-07-22 Swanson Neubert W Spacer device
US6321459B1 (en) * 2000-03-22 2001-11-27 Mitchell R. Mastrangelo Device for assisting a user to draw a topographical contour map

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4601108A (en) * 1984-10-25 1986-07-22 Swanson Neubert W Spacer device
US6321459B1 (en) * 2000-03-22 2001-11-27 Mitchell R. Mastrangelo Device for assisting a user to draw a topographical contour map

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