NL97567C - - Google Patents
Info
- Publication number
- NL97567C NL97567C NL97567DA NL97567C NL 97567 C NL97567 C NL 97567C NL 97567D A NL97567D A NL 97567DA NL 97567 C NL97567 C NL 97567C
- Authority
- NL
- Netherlands
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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/323—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only for loudspeakers
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE788934X | 1953-10-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL97567C true NL97567C (fr) |
Family
ID=20336876
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL97567D NL97567C (fr) | 1953-10-02 | ||
| NL191082D NL191082B (nl) | 1953-10-02 | Implanteerbaar automatisch cardioverter/defibrillatorstelsel. |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL191082D NL191082B (nl) | 1953-10-02 | Implanteerbaar automatisch cardioverter/defibrillatorstelsel. |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2979149A (fr) |
| FR (1) | FR1118760A (fr) |
| GB (1) | GB788934A (fr) |
| NL (2) | NL191082B (fr) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL298920A (fr) * | 1962-10-12 | |||
| SE387512B (sv) * | 1973-08-24 | 1976-09-06 | S Carlsson | Hogtalare for sterofonisk ljudatergivningsanleggning, samt av tva sadana hogtalare bestaende hogtalarpar |
| JP2823157B2 (ja) * | 1986-04-01 | 1998-11-11 | キヤノン株式会社 | オーデイオ出力システム |
| GB2230408A (en) * | 1989-03-17 | 1990-10-17 | Dimitris Lioupis | Loudspeakers |
| US8634586B2 (en) * | 2009-06-26 | 2014-01-21 | Polk Audio, Inc. | Ceiling-mounted loudspeaker enclosure |
| US8066095B1 (en) * | 2009-09-24 | 2011-11-29 | Nicholas Sheppard Bromer | Transverse waveguide |
| US8867749B2 (en) | 2011-04-18 | 2014-10-21 | Paul Blair McGowan | Acoustic spatial projector |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2065367A (en) * | 1935-12-31 | 1936-12-22 | Robert B Evans | Sound diffusing apparatus |
| US2206427A (en) * | 1937-03-31 | 1940-07-02 | Rca Corp | Sound reproducing apparatus |
| US2143175A (en) * | 1937-10-23 | 1939-01-10 | Samuel A Waite | Sound reproducing system |
| US2179840A (en) * | 1938-05-03 | 1939-11-14 | Frida Bucky | Loudspeaker arrangement |
| US2373692A (en) * | 1942-10-03 | 1945-04-17 | Ray L Smith | Loud-speaker |
| CH248861A (de) * | 1944-05-30 | 1947-05-31 | Philips Nv | Stereophonisches Wiedergabegerät. |
| FR913655A (fr) * | 1945-03-22 | 1946-09-17 | Perfectionnements aux appareils reproducteurs électriques de sons tels que radio-récepteurs et phonographes | |
| FR54541E (fr) * | 1946-05-09 | 1950-05-04 | Perfectionnements aux appareils reproducteurs électriques de sons tels que radio-récepteurs et phonographes | |
| BE478613A (fr) * | 1946-09-20 | |||
| US2722990A (en) * | 1949-11-08 | 1955-11-08 | Decca Record Co Ltd | Loudspeaker assemblies |
| US2694462A (en) * | 1951-09-19 | 1954-11-16 | Robbins Frank | Acoustic system for loud-speakers |
| US2701025A (en) * | 1952-02-05 | 1955-02-01 | George H Kuhl | High fidelity sound system |
| US2824617A (en) * | 1952-09-15 | 1958-02-25 | Philips Corp | Sound reproducing device |
-
0
- NL NL97567D patent/NL97567C/xx active
- NL NL191082D patent/NL191082B/xx unknown
-
1954
- 1954-09-24 FR FR1118760D patent/FR1118760A/fr not_active Expired
- 1954-09-27 GB GB27784/54A patent/GB788934A/en not_active Expired
- 1954-09-27 US US458650A patent/US2979149A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR1118760A (fr) | 1956-06-11 |
| NL191082B (nl) | |
| US2979149A (en) | 1961-04-11 |
| GB788934A (en) | 1958-01-08 |