LU54185A1 - - Google Patents
Info
- Publication number
- LU54185A1 LU54185A1 LU54185DA LU54185A1 LU 54185 A1 LU54185 A1 LU 54185A1 LU 54185D A LU54185D A LU 54185DA LU 54185 A1 LU54185 A1 LU 54185A1
- Authority
- LU
- Luxembourg
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/515—Devices for calling a subscriber by generating or selecting signals other than trains of pulses of similar shape, or signals other than currents of one or more different frequencies, e.g. generation of dc signals of alternating polarity, coded pulses or impedance dialling
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Input From Keyboards Or The Like (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR71558A FR1525030A (fr) | 1966-07-29 | 1966-07-29 | Disposition de clavier pour numérotation par variations d'impédance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| LU54185A1 true LU54185A1 (xx) | 1969-05-21 |
Family
ID=8614519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LU54185D LU54185A1 (xx) | 1966-07-29 | 1967-07-26 |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3508013A (xx) |
| BE (1) | BE701754A (xx) |
| CH (1) | CH476432A (xx) |
| DE (1) | DE1537746A1 (xx) |
| FR (1) | FR1525030A (xx) |
| GB (1) | GB1195399A (xx) |
| LU (1) | LU54185A1 (xx) |
| NL (1) | NL6709457A (xx) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3665489A (en) * | 1969-06-06 | 1972-05-23 | Ericsson Telefon Ab L M | Telephone instrument for voice frequency choice of number |
| FR2508199B1 (fr) * | 1981-06-23 | 1987-04-30 | Renix Electronique Sa | Clavier a touches d'actionnement de contacts electriques et a lecture de son etat parmi quatre etats possibles |
| US8471733B2 (en) * | 2006-06-20 | 2013-06-25 | Qualcomm Incorporated | Two-wire connection to a key matrix in a mobile device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2927971A (en) * | 1957-12-30 | 1960-03-08 | Bell Telephone Labor Inc | Subscriber call transmitting system |
-
1966
- 1966-07-29 FR FR71558A patent/FR1525030A/fr not_active Expired
-
1967
- 1967-07-07 NL NL6709457A patent/NL6709457A/xx unknown
- 1967-07-19 DE DE19671537746 patent/DE1537746A1/de active Pending
- 1967-07-24 BE BE701754D patent/BE701754A/xx unknown
- 1967-07-24 CH CH1048967A patent/CH476432A/fr not_active IP Right Cessation
- 1967-07-26 LU LU54185D patent/LU54185A1/xx unknown
- 1967-07-28 US US656879A patent/US3508013A/en not_active Expired - Lifetime
- 1967-07-31 GB GB35090/67A patent/GB1195399A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1537746A1 (de) | 1969-10-16 |
| NL6709457A (xx) | 1968-01-30 |
| BE701754A (xx) | 1968-01-24 |
| FR1525030A (fr) | 1968-05-17 |
| GB1195399A (en) | 1970-06-17 |
| US3508013A (en) | 1970-04-21 |
| CH476432A (fr) | 1969-07-31 |