BE460220A - - Google Patents
Info
- Publication number
- BE460220A BE460220A BE460220DA BE460220A BE 460220 A BE460220 A BE 460220A BE 460220D A BE460220D A BE 460220DA BE 460220 A BE460220 A BE 460220A
- Authority
- BE
- Belgium
- Prior art keywords
- rule
- emi
- ruler
- protractor
- air bubble
- Prior art date
Links
- 239000011521 glass Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- WTEVQBCEXWBHNA-YFHOEESVSA-N neral Chemical compound CC(C)=CCC\C(C)=C/C=O WTEVQBCEXWBHNA-YFHOEESVSA-N 0.000 claims 2
- WTEVQBCEXWBHNA-UHFFFAOYSA-N Citral Natural products CC(C)=CCCC(C)=CC=O WTEVQBCEXWBHNA-UHFFFAOYSA-N 0.000 claims 1
- WTEVQBCEXWBHNA-JXMROGBWSA-N citral A Natural products CC(C)=CCC\C(C)=C\C=O WTEVQBCEXWBHNA-JXMROGBWSA-N 0.000 claims 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 240000001973 Ficus microcarpa Species 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B3/00—Measuring instruments characterised by the use of mechanical techniques
- G01B3/02—Rulers with scales or marks for direct reading
-
- 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
- B43L13/08—Protractor heads
-
- 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
- B43L7/005—Straightedges combined with other drawing aids
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length-Measuring Instruments Using Mechanical Means (AREA)
- Drawing Aids And Blackboards (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR909224T | 1945-02-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE460220A true BE460220A (2) |
Family
ID=9407778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE460220D BE460220A (2) | 1945-02-13 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE460220A (2) |
| FR (1) | FR909224A (2) |
-
0
- BE BE460220D patent/BE460220A/fr unknown
-
1945
- 1945-02-13 FR FR909224D patent/FR909224A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR909224A (fr) | 1946-05-02 |
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