CH243970A - Telephone set with back hearing loss. - Google Patents
Telephone set with back hearing loss.Info
- Publication number
- CH243970A CH243970A CH243970DA CH243970A CH 243970 A CH243970 A CH 243970A CH 243970D A CH243970D A CH 243970DA CH 243970 A CH243970 A CH 243970A
- Authority
- CH
- Switzerland
- Prior art keywords
- telephone set
- hearing loss
- back hearing
- loss
- telephone
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/58—Anti-side-tone circuits
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH243970T | 1944-09-23 | ||
CH240690T | 1944-09-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH243970A true CH243970A (en) | 1946-08-15 |
Family
ID=25728523
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH240690D CH240690A (en) | 1944-09-23 | 1944-07-24 | Telephone set with back hearing loss. |
CH243970D CH243970A (en) | 1944-09-23 | 1944-09-23 | Telephone set with back hearing loss. |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH240690D CH240690A (en) | 1944-09-23 | 1944-07-24 | Telephone set with back hearing loss. |
Country Status (1)
Country | Link |
---|---|
CH (2) | CH240690A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8319786D0 (en) * | 1983-07-22 | 1983-08-24 | Plessey Co Plc | Adaptive line hybrids |
-
1944
- 1944-07-24 CH CH240690D patent/CH240690A/en unknown
- 1944-09-23 CH CH243970D patent/CH243970A/en unknown
Also Published As
Publication number | Publication date |
---|---|
CH240690A (en) | 1946-01-15 |
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