FR539352A - Compas pour le tracage de courbes ovales - Google Patents
Compas pour le tracage de courbes ovalesInfo
- Publication number
- FR539352A FR539352A FR539352DA FR539352A FR 539352 A FR539352 A FR 539352A FR 539352D A FR539352D A FR 539352DA FR 539352 A FR539352 A FR 539352A
- Authority
- FR
- France
- Prior art keywords
- compass
- plotting
- oval curves
- oval
- curves
- 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.)
- Expired
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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/48—Sulfur dioxide; Sulfurous acid
- C01B17/50—Preparation of sulfur dioxide
- C01B17/54—Preparation of sulfur dioxide by burning elemental sulfur
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Toys (AREA)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE346077T | 1920-12-15 | ||
CH96192T | 1921-05-11 | ||
FR539352T | 1921-05-21 | ||
GB19061/21A GB187031A (en) | 1920-12-15 | 1921-07-14 | Instrument for drawing oviform curves |
Publications (1)
Publication Number | Publication Date |
---|---|
FR539352A true FR539352A (fr) | 1922-06-24 |
Family
ID=10123097
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR539352D Expired FR539352A (fr) | 1920-12-15 | 1921-05-21 | Compas pour le tracage de courbes ovales |
Country Status (4)
Country | Link |
---|---|
CH (1) | CH96192A (fr) |
DE (1) | DE346077C (fr) |
FR (1) | FR539352A (fr) |
GB (1) | GB187031A (fr) |
-
1920
- 1920-12-15 DE DE1920346077D patent/DE346077C/de not_active Expired
-
1921
- 1921-05-11 CH CH96192D patent/CH96192A/de unknown
- 1921-05-21 FR FR539352D patent/FR539352A/fr not_active Expired
- 1921-07-14 GB GB19061/21A patent/GB187031A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CH96192A (de) | 1922-09-16 |
DE346077C (fr) | 1921-12-23 |
GB187031A (en) | 1922-10-16 |
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