BE466584A - - Google Patents
Info
- Publication number
- BE466584A BE466584A BE466584DA BE466584A BE 466584 A BE466584 A BE 466584A BE 466584D A BE466584D A BE 466584DA BE 466584 A BE466584 A BE 466584A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11C—FATTY ACIDS FROM FATS, OILS OR WAXES; CANDLES; FATS, OILS OR FATTY ACIDS BY CHEMICAL MODIFICATION OF FATS, OILS, OR FATTY ACIDS OBTAINED THEREFROM
- C11C3/00—Fats, oils, or fatty acids by chemical modification of fats, oils, or fatty acids obtained therefrom
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D13/00—Making of soap or soap solutions in general; Apparatus therefor
- C11D13/02—Boiling soap; Refining
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- General Chemical & Material Sciences (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US532142A US2440249A (en) | 1944-04-21 | 1944-04-21 | Key controlled numerical digit register equipped with discharge tube means |
Publications (1)
Publication Number | Publication Date |
---|---|
BE466584A true BE466584A (da) |
Family
ID=24120530
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE466584D BE466584A (da) | 1944-04-21 |
Country Status (6)
Country | Link |
---|---|
US (1) | US2440249A (da) |
BE (1) | BE466584A (da) |
CH (1) | CH276280A (da) |
FR (1) | FR925808A (da) |
GB (1) | GB601906A (da) |
NL (1) | NL69825C (da) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2644932A (en) * | 1947-12-11 | 1953-07-07 | Ericsson Telefon Ab L M | Pulse amplitude responsive selective system |
US2622141A (en) * | 1948-10-28 | 1952-12-16 | Oberman Roelof Maarten Marie | Signaling system |
NL134703C (da) * | 1965-05-19 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1337715A (en) * | 1920-04-20 | Telephone system | ||
US1854106A (en) * | 1922-12-22 | 1932-04-12 | Western Electric Co | Automatic telephone system |
US1982290A (en) * | 1927-12-24 | 1934-11-27 | John E Gardner | Selecting system |
US2315344A (en) * | 1940-03-22 | 1943-03-30 | Bell Telephone Labor Inc | Call transmitter |
US2269022A (en) * | 1940-09-07 | 1942-01-06 | Bell Telephone Labor Inc | Telephone system |
-
0
- NL NL69825D patent/NL69825C/xx active
- BE BE466584D patent/BE466584A/xx unknown
-
1944
- 1944-04-21 US US532142A patent/US2440249A/en not_active Expired - Lifetime
-
1945
- 1945-03-02 GB GB5241/45A patent/GB601906A/en not_active Expired
-
1946
- 1946-04-19 FR FR925808D patent/FR925808A/fr not_active Expired
- 1946-12-18 CH CH276280D patent/CH276280A/fr unknown
Also Published As
Publication number | Publication date |
---|---|
FR925808A (fr) | 1947-09-15 |
CH276280A (fr) | 1951-06-30 |
GB601906A (en) | 1948-05-14 |
US2440249A (en) | 1948-04-27 |
NL69825C (da) |