NL18244C - - Google Patents
Info
- Publication number
- NL18244C NL18244C NL18244DA NL18244C NL 18244 C NL18244 C NL 18244C NL 18244D A NL18244D A NL 18244DA NL 18244 C NL18244 C NL 18244C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/08—Indicating faults in circuits or apparatus
- H04M3/12—Marking faulty circuits "busy"; Enabling equipment to disengage itself from faulty circuits ; Using redundant circuits; Response of a circuit, apparatus or system to an error
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Measurement Of Unknown Time Intervals (AREA)
- Electromechanical Clocks (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB15416/24A GB239630A (en) | 1924-06-26 | 1924-06-26 | Improvements in timing devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL18244C true NL18244C (en:Method) |
Family
ID=10058741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL18244D NL18244C (en:Method) | 1924-06-26 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US1661249A (en:Method) |
| FR (1) | FR590635A (en:Method) |
| GB (1) | GB239630A (en:Method) |
| NL (1) | NL18244C (en:Method) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2911144A (en) * | 1955-12-06 | 1959-11-03 | Lee | Recorders |
| US3324245A (en) * | 1963-04-04 | 1967-06-06 | Harold T Stenhammar | Ringing signal responsive, recording and control device |
-
0
- NL NL18244D patent/NL18244C/xx active
-
1924
- 1924-06-26 GB GB15416/24A patent/GB239630A/en not_active Expired
- 1924-12-20 FR FR590635D patent/FR590635A/fr not_active Expired
-
1925
- 1925-05-18 US US30970A patent/US1661249A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US1661249A (en) | 1928-03-06 |
| FR590635A (fr) | 1925-06-19 |
| GB239630A (en) | 1925-09-17 |