DE96843C - - Google Patents
Info
- Publication number
- DE96843C DE96843C DENDAT96843D DE96843DA DE96843C DE 96843 C DE96843 C DE 96843C DE NDAT96843 D DENDAT96843 D DE NDAT96843D DE 96843D A DE96843D A DE 96843DA DE 96843 C DE96843 C DE 96843C
- Authority
- DE
- Germany
- Prior art keywords
- lines
- blackboard
- school
- bar
- eccentric
- 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
- 239000010454 slate Substances 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 1
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
- B43L13/00—Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
- B43L13/02—Draughting machines or drawing devices for keeping parallelism
- B43L13/04—Guides for rulers
Landscapes
- Drawing Aids And Blackboards (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE96843C true DE96843C (fr) |
Family
ID=367941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT96843D Active DE96843C (fr) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE96843C (fr) |
-
0
- DE DENDAT96843D patent/DE96843C/de active Active
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