NL301973A - - Google Patents
Info
- Publication number
- NL301973A NL301973A NL301973DA NL301973A NL 301973 A NL301973 A NL 301973A NL 301973D A NL301973D A NL 301973DA NL 301973 A NL301973 A NL 301973A
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M17/00—Prepayment of wireline communication systems, wireless communication systems or telephone systems
- H04M17/02—Coin-freed or check-freed systems, e.g. mobile- or card-operated phones, public telephones or booths
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B29/00—Maps; Plans; Charts; Diagrams, e.g. route diagram
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- Educational Technology (AREA)
- Business, Economics & Management (AREA)
- Educational Administration (AREA)
- Mathematical Physics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computer Security & Cryptography (AREA)
- Signal Processing (AREA)
- Prepayment Telephone Systems (AREA)
- Telephone Set Structure (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2448527A GB301973A (en) | 1928-06-01 | 1928-06-01 | A telephone index |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL301973A true NL301973A (ru) |
Family
ID=10212414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL301973D NL301973A (ru) | 1928-06-01 |
Country Status (2)
| Country | Link |
|---|---|
| GB (2) | GB301973A (ru) |
| NL (1) | NL301973A (ru) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4825571A (en) * | 1987-05-26 | 1989-05-02 | Oliver Jennings | Retractable calendar |
| US5115757A (en) * | 1991-03-06 | 1992-05-26 | Mitsuhiko Abe | Clip-carrying bookmarker |
-
0
- NL NL301973D patent/NL301973A/xx unknown
- GB GB1037070D patent/GB1037070A/en active Active
-
1928
- 1928-06-01 GB GB2448527A patent/GB301973A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1037070A (ru) | |
| GB301973A (en) | 1928-12-13 |