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
Links
- 230000009466 transformation Effects 0.000 description 2
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
Publications (1)
Publication Number | Publication Date |
---|---|
DE345507C true DE345507C (enrdf_load_html_response) |
Family
ID=573782
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT345507D Active DE345507C (enrdf_load_html_response) |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE345507C (enrdf_load_html_response) |
Cited By (2)
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 |
-
0
- DE DENDAT345507D patent/DE345507C/de active Active
Cited By (2)
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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