BE362471A - - Google Patents

Info

Publication number: BE362471A
Authority: BE; Belgium

Application number

Priority date (The priority date 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 date listed.)

1927-07-09

Publication of BE362471A publication Critical patent/BE362471A/xx

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
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/02—Hot-water central heating systems with forced circulation, e.g. by pumps

Landscapes

Engineering & Computer Science (AREA)
Physics & Mathematics (AREA)
Health & Medical Sciences (AREA)
Public Health (AREA)
Acoustics & Sound (AREA)
Signal Processing (AREA)
Thermal Sciences (AREA)
Chemical & Material Sciences (AREA)
Combustion & Propulsion (AREA)
Mechanical Engineering (AREA)
General Engineering & Computer Science (AREA)

BE362471D 1927-07-09 BE362471A (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
FR649156T		1927-07-09

Publications (1)

Publication Number	Publication Date
BE362471A true BE362471A (fr)

Family

ID=9003155

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE362471D BE362471A (fr)	1927-07-09

Country Status (2)

Country	Link
BE (1)	BE362471A (fr)
FR (1)	FR649156A (fr)

0
- BE BE362471D patent/BE362471A/xx unknown
1927
- 1927-07-09 FR FR649156D patent/FR649156A/fr not_active Expired

Also Published As

Publication number	Publication date
FR649156A (fr)	1928-12-19

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