CH549317A - Waehl-einrichtung bei telephonapparaten. - Google Patents
Waehl-einrichtung bei telephonapparaten.Info
- Publication number
- CH549317A CH549317A CH270572A CH270572A CH549317A CH 549317 A CH549317 A CH 549317A CH 270572 A CH270572 A CH 270572A CH 270572 A CH270572 A CH 270572A CH 549317 A CH549317 A CH 549317A
- Authority
- CH
- Switzerland
- Prior art keywords
- selection device
- telephone sets
- telephone
- sets
- selection
- Prior art date
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)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH270572A CH549317A (de) | 1972-02-25 | 1972-02-25 | Waehl-einrichtung bei telephonapparaten. |
DE19722221775 DE2221775A1 (de) | 1972-02-25 | 1972-05-04 | Neuartiges waehlsystem bei telephonapparaten |
NL7214284A NL7214284A (de) | 1972-02-25 | 1972-10-20 | |
DE19732355301 DE2355301A1 (de) | 1972-02-25 | 1973-11-06 | Neuartiges waehlsystem bei telephonapparaten |
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 |
---|---|
CH549317A true CH549317A (de) | 1974-05-15 |
Family
ID=4239739
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH270572A CH549317A (de) | 1972-02-25 | 1972-02-25 | Waehl-einrichtung bei telephonapparaten. |
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 |
---|---|
NL7214284A (de) | 1973-08-28 |
DE2221775A1 (de) | 1973-09-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PL | Patent ceased |