NL41927B - - Google Patents
Info
- Publication number
- NL41927B NL41927B NL41927DA NL41927B NL 41927 B NL41927 B NL 41927B NL 41927D A NL41927D A NL 41927DA NL 41927 B NL41927 B NL 41927B
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Mechanical Engineering (AREA)
- Alarm Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE302678T | 1927-12-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL41927B true NL41927B (en:Method) |
Family
ID=31894342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL41927D NL41927B (en:Method) | 1927-12-20 |
Country Status (3)
| Country | Link |
|---|---|
| FR (1) | FR652986A (en:Method) |
| GB (2) | GB316148A (en:Method) |
| NL (1) | NL41927B (en:Method) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9601528D0 (en) * | 1996-01-25 | 1996-03-27 | Chignell Richard J | Underground pipe locating system |
-
0
- NL NL41927D patent/NL41927B/xx unknown
-
1928
- 1928-04-18 FR FR652986D patent/FR652986A/fr not_active Expired
- 1928-07-04 GB GB22658/29A patent/GB316148A/en not_active Expired
- 1928-07-04 GB GB19418/28A patent/GB302678A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB302678A (en:Method) | 1929-12-04 |
| FR652986A (fr) | 1929-03-15 |
| GB316148A (en) | 1930-01-06 |