Classifications

• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
  • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
  • E04B2/84—Walls made by casting, pouring, or tamping in situ
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
  • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
  • H04R9/12—Gramophone pick-ups using a stylus; Recorders using a stylus

Landscapes

• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Architecture (AREA)
• Acoustics & Sound (AREA)
• Signal Processing (AREA)
• Electromagnetism (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Reciprocating, Oscillating Or Vibrating Motors (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=9814483

Family Applications (1)

Country Status (3)

• 0
  • BE BE471728D patent/BE471728A/xx unknown
• 1945
  • 1945-03-14 GB GB643845A patent/GB594151A/en not_active Expired
• 1946
  • 1946-06-07 FR FR927744D patent/FR927744A/fr not_active Expired

Also Published As

Similar Documents