NL6814918A - - Google Patents
Info
- Publication number
- NL6814918A NL6814918A NL6814918A NL6814918A NL6814918A NL 6814918 A NL6814918 A NL 6814918A NL 6814918 A NL6814918 A NL 6814918A NL 6814918 A NL6814918 A NL 6814918A NL 6814918 A NL6814918 A NL 6814918A
- 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
- H04M1/30—Devices which can set up and transmit only one digit at a time
- H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Switch Cases, Indication, And Locking (AREA)
- Push-Button Switches (AREA)
- Input From Keyboards Or The Like (AREA)
- Electronic Switches (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4764467 | 1967-10-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL6814918A true NL6814918A (xx) | 1969-04-22 |
Family
ID=10445750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL6814918A NL6814918A (xx) | 1967-10-19 | 1968-10-18 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3546619A (xx) |
| DE (1) | DE1762919A1 (xx) |
| ES (1) | ES359360A1 (xx) |
| FR (1) | FR1589566A (xx) |
| NL (1) | NL6814918A (xx) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3725908A (en) * | 1971-06-21 | 1973-04-03 | Control Data Corp | Impact transducer keyboard apparatus |
| US3824486A (en) * | 1972-10-27 | 1974-07-16 | Vernitron Corp | Solid state switching circuit employing a selectively damped piezoelectric resonator to control a thyristor circuit |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3139476A (en) * | 1964-06-30 | Electrical musical string instrument | ||
| US3265992A (en) * | 1961-02-24 | 1966-08-09 | Litton Systems Inc | Pulsed oscillator with start stop controls |
| US3423514A (en) * | 1961-12-01 | 1969-01-21 | Hohner Ag Matth | Oscillating generator particularly designed for polyphonic musical instruments |
-
1968
- 1968-09-21 DE DE19681762919 patent/DE1762919A1/de active Pending
- 1968-10-03 US US764853A patent/US3546619A/en not_active Expired - Lifetime
- 1968-10-18 NL NL6814918A patent/NL6814918A/xx unknown
- 1968-10-18 FR FR1589566D patent/FR1589566A/fr not_active Expired
- 1968-10-19 ES ES359360A patent/ES359360A1/es not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US3546619A (en) | 1970-12-08 |
| ES359360A1 (es) | 1970-06-01 |
| FR1589566A (xx) | 1970-03-31 |
| DE1762919A1 (de) | 1970-12-23 |