FR374128A - Hygienic ear isolator - Google Patents
Hygienic ear isolatorInfo
- Publication number
- FR374128A FR374128A FR374128DA FR374128A FR 374128 A FR374128 A FR 374128A FR 374128D A FR374128D A FR 374128DA FR 374128 A FR374128 A FR 374128A
- Authority
- FR
- France
- Prior art keywords
- hygienic
- isolator
- ear
- hygienic ear
- ear isolator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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
- H04R1/12—Sanitary or hygienic devices for mouthpieces or earpieces, e.g. for protecting against infection
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR374128T | 1907-02-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR374128A true FR374128A (en) | 1907-06-05 |
Family
ID=1420795
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR374128D Expired FR374128A (en) | 1907-02-01 | 1907-02-01 | Hygienic ear isolator |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR374128A (en) |
-
1907
- 1907-02-01 FR FR374128D patent/FR374128A/en not_active Expired
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