BE460670A - - Google Patents
Info
- Publication number
- BE460670A BE460670A BE460670DA BE460670A BE 460670 A BE460670 A BE 460670A BE 460670D A BE460670D A BE 460670DA BE 460670 A BE460670 A BE 460670A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
- C07F9/02—Phosphorus compounds
- C07F9/547—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom
- C07F9/6561—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom containing systems of two or more relevant hetero rings condensed among themselves or condensed with a common carbocyclic ring or ring system, with or without other non-condensed hetero rings
- C07F9/65616—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom containing systems of two or more relevant hetero rings condensed among themselves or condensed with a common carbocyclic ring or ring system, with or without other non-condensed hetero rings containing the ring system having three or more than three double bonds between ring members or between ring members and non-ring members, e.g. purine or analogs
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
- H04R17/04—Gramophone pick-ups using a stylus; Recorders using a stylus
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK615979X | 1944-01-28 | ||
| FR792055A FR1343459A (en) | 1959-04-14 | 1959-04-14 | Theophylline derivatives and their preparation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE460670A true BE460670A (en) |
Family
ID=26068263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE460670D BE460670A (en) | 1944-01-28 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE460670A (en) |
| GB (1) | GB615979A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2780680A (en) * | 1952-03-25 | 1957-02-05 | Webster Electric Co Inc | Transducer |
| US4441176A (en) * | 1982-04-08 | 1984-04-03 | Rca Corporation | Damping mechanism for a video disc stylus holder |
| GB2120446A (en) * | 1982-04-08 | 1983-11-30 | Rca Corp | Holding apparatus for a disc record signal pickup stylus |
| FR2755856B1 (en) | 1996-11-21 | 1999-01-29 | Merck Clevenot Laboratoires | MICROCAPSULES OF CHINA OR CHINA DERIVATIVES CONTAINING A HYDROPHOBIC SUBSTANCE, IN PARTICULAR A SUN FILTER AND PROCESS FOR PREPARING SUCH MICROCAPSULES |
-
0
- BE BE460670D patent/BE460670A/xx unknown
-
1945
- 1945-10-30 GB GB28720/45A patent/GB615979A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB615979A (en) | 1949-01-14 |