BE487847A - - Google Patents
Info
- Publication number
- BE487847A BE487847A BE487847DA BE487847A BE 487847 A BE487847 A BE 487847A BE 487847D A BE487847D A BE 487847DA BE 487847 A BE487847 A BE 487847A
- Authority
- BE
- Belgium
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
- B43L13/00—Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
- B43L13/14—Devices for drawing in perspective
- B43L13/141—Two-dimensional devices
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE271961X | 1948-03-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE487847A true BE487847A (en:Method) |
Family
ID=20306781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE487847D BE487847A (en:Method) | 1948-03-15 |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE487847A (en:Method) |
| CH (1) | CH271961A (en:Method) |
| DE (1) | DE913239C (en:Method) |
| FR (1) | FR982895A (en:Method) |
| GB (1) | GB671669A (en:Method) |
-
0
- BE BE487847D patent/BE487847A/xx unknown
-
1949
- 1949-03-12 FR FR982895D patent/FR982895A/fr not_active Expired
- 1949-03-14 CH CH271961D patent/CH271961A/de unknown
- 1949-03-14 GB GB6906/49A patent/GB671669A/en not_active Expired
- 1949-03-15 DE DEA14657A patent/DE913239C/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB671669A (en) | 1952-05-07 |
| DE913239C (de) | 1954-06-10 |
| FR982895A (fr) | 1951-06-15 |
| CH271961A (de) | 1950-11-30 |