NL7214284A - - Google Patents
Info
- Publication number
- NL7214284A NL7214284A NL7214284A NL7214284A NL7214284A NL 7214284 A NL7214284 A NL 7214284A NL 7214284 A NL7214284 A NL 7214284A NL 7214284 A NL7214284 A NL 7214284A NL 7214284 A NL7214284 A NL 7214284A
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/22—Illumination; Arrangements for improving the visibility of characters on dials
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Audible And Visible Signals (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH270572A CH549317A (de) | 1972-02-25 | 1972-02-25 | Waehl-einrichtung bei telephonapparaten. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL7214284A true NL7214284A (de) | 1973-08-28 |
Family
ID=4239739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL7214284A NL7214284A (de) | 1972-02-25 | 1972-10-20 |
Country Status (3)
| Country | Link |
|---|---|
| CH (1) | CH549317A (de) |
| DE (1) | DE2221775A1 (de) |
| NL (1) | NL7214284A (de) |
-
1972
- 1972-02-25 CH CH270572A patent/CH549317A/de not_active IP Right Cessation
- 1972-05-04 DE DE19722221775 patent/DE2221775A1/de active Pending
- 1972-10-20 NL NL7214284A patent/NL7214284A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE2221775A1 (de) | 1973-09-06 |
| CH549317A (de) | 1974-05-15 |