BE362471A - - Google Patents

Info

Publication number
BE362471A
BE362471A BE362471DA BE362471A BE 362471 A BE362471 A BE 362471A BE 362471D A BE362471D A BE 362471DA BE 362471 A BE362471 A BE 362471A
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.)
Publication of BE362471A publication Critical patent/BE362471A/xx

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
    • 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 (zh)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
BE362471A true BE362471A (zh)

Family

ID=9003155

Family Applications (1)

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

Country Status (2)

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

Also Published As

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

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