NL6709457A - - Google Patents
Info
- Publication number
- NL6709457A NL6709457A NL6709457A NL6709457A NL6709457A NL 6709457 A NL6709457 A NL 6709457A NL 6709457 A NL6709457 A NL 6709457A NL 6709457 A NL6709457 A NL 6709457A NL 6709457 A NL6709457 A NL 6709457A
- Authority
- NL
- Netherlands
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 |
---|---|
NL6709457A true NL6709457A (fr) | 1968-01-30 |
Family
ID=8614519
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL6709457A NL6709457A (fr) | 1966-07-29 | 1967-07-07 |
Country Status (8)
Country | Link |
---|---|
US (1) | US3508013A (fr) |
BE (1) | BE701754A (fr) |
CH (1) | CH476432A (fr) |
DE (1) | DE1537746A1 (fr) |
FR (1) | FR1525030A (fr) |
GB (1) | GB1195399A (fr) |
LU (1) | LU54185A1 (fr) |
NL (1) | NL6709457A (fr) |
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 CH CH1048967A patent/CH476432A/fr not_active IP Right Cessation
- 1967-07-24 BE BE701754D patent/BE701754A/xx unknown
- 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 |
---|---|
CH476432A (fr) | 1969-07-31 |
GB1195399A (en) | 1970-06-17 |
LU54185A1 (fr) | 1969-05-21 |
US3508013A (en) | 1970-04-21 |
BE701754A (fr) | 1968-01-24 |
FR1525030A (fr) | 1968-05-17 |
DE1537746A1 (de) | 1969-10-16 |