NL72049C - - Google Patents
Info
- Publication number
- NL72049C NL72049C NL72049DA NL72049C NL 72049 C NL72049 C NL 72049C NL 72049D A NL72049D A NL 72049DA NL 72049 C NL72049 C NL 72049C
- Authority
- NL
- Netherlands
Links
Classifications
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- X-Ray Techniques (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL282554X | 1949-06-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL72049C true NL72049C (mo) |
Family
ID=19782352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL72049D NL72049C (mo) | 1949-06-14 |
Country Status (2)
| Country | Link |
|---|---|
| CH (1) | CH282554A (mo) |
| NL (1) | NL72049C (mo) |
-
0
- NL NL72049D patent/NL72049C/xx active
-
1950
- 1950-06-12 CH CH282554D patent/CH282554A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH282554A (de) | 1952-04-30 |