BE735921A - - Google Patents
Info
- Publication number
- BE735921A BE735921A BE735921DA BE735921A BE 735921 A BE735921 A BE 735921A BE 735921D A BE735921D A BE 735921DA BE 735921 A BE735921 A BE 735921A
- 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 |
|---|---|---|---|
| BE735921 | 1969-07-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE735921A true BE735921A (ja) | 1969-12-16 |
Family
ID=3855045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE735921D BE735921A (ja) | 1969-07-10 | 1969-07-10 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE735921A (ja) |
| DE (1) | DE2034051A1 (ja) |
| FR (1) | FR2057737A5 (ja) |
| GB (1) | GB1311912A (ja) |
-
1969
- 1969-07-10 BE BE735921D patent/BE735921A/xx unknown
-
1970
- 1970-07-08 GB GB3306570A patent/GB1311912A/en not_active Expired
- 1970-07-09 DE DE19702034051 patent/DE2034051A1/de active Pending
- 1970-07-09 FR FR7025450A patent/FR2057737A5/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2034051A1 (de) | 1971-01-14 |
| FR2057737A5 (ja) | 1971-05-21 |
| GB1311912A (en) | 1973-03-28 |