NL20970C - - Google Patents
Info
- Publication number
- NL20970C NL20970C NL20970DA NL20970C NL 20970 C NL20970 C NL 20970C NL 20970D A NL20970D A NL 20970DA NL 20970 C NL20970 C NL 20970C
- Authority
- NL
- Netherlands
Links
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F5/00—Apparatus for producing preselected time intervals for use as timing standards
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB766627A GB292261A (en) | 1927-03-19 | 1927-03-19 | Improvements in circuit interrupting devices particularly applicable for telephone systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL20970C true NL20970C (it) |
Family
ID=9837478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL20970D NL20970C (it) | 1927-03-19 |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE350874A (it) |
| CH (1) | CH133031A (it) |
| FR (1) | FR654068A (it) |
| GB (1) | GB292261A (it) |
| NL (1) | NL20970C (it) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2160017B (en) * | 1984-06-05 | 1988-07-27 | Inertia Switch Ltd | Electrical switches responsive to two stimuli |
-
0
- NL NL20970D patent/NL20970C/xx active
- BE BE350874D patent/BE350874A/xx unknown
-
1927
- 1927-03-19 GB GB766627A patent/GB292261A/en not_active Expired
-
1928
- 1928-04-24 CH CH133031D patent/CH133031A/de unknown
- 1928-05-10 FR FR654068D patent/FR654068A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE350874A (it) | |
| GB292261A (en) | 1928-06-19 |
| CH133031A (de) | 1929-05-15 |
| FR654068A (fr) | 1929-04-03 |