NL70511C - - Google Patents
Info
- Publication number
- NL70511C NL70511C NL70511DA NL70511C NL 70511 C NL70511 C NL 70511C NL 70511D A NL70511D A NL 70511DA NL 70511 C NL70511 C NL 70511C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07J—STEROIDS
- C07J19/00—Normal steroids containing carbon, hydrogen, halogen or oxygen, substituted in position 17 by a lactone ring
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07J—STEROIDS
- C07J75/00—Processes for the preparation of steroids in general
-
- 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
- H04M1/23—Construction or mounting of dials or of equivalent devices; Means for facilitating the use thereof
-
- 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
- H04Q1/32—Signalling arrangements; Manipulation of signalling currents using trains of dc pulses
- H04Q1/34—Impulse regenerators with mechanical or other non-electrical marking arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Computer Networks & Wireless Communication (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US523626A US2406001A (en) | 1944-02-24 | 1944-02-24 | Electrical signaling system |
| US527921A US2433347A (en) | 1944-02-24 | 1944-03-24 | Telecommunication system |
| US583478A US2434910A (en) | 1944-02-24 | 1945-03-19 | Electrical impulse sending device |
| US723446A US2502440A (en) | 1947-01-21 | 1947-01-21 | Variable impulse transmitter |
| DET0030059 | 1965-12-17 | ||
| DET0030058 | 1965-12-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL70511C true NL70511C (da) |
Family
ID=27544975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL70511D NL70511C (da) | 1944-02-24 |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE857821C (da) |
| NL (1) | NL70511C (da) |
-
0
- NL NL70511D patent/NL70511C/xx active
-
1950
- 1950-10-01 DE DEI3002A patent/DE857821C/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE857821C (de) | 1952-12-01 |