Apparatus and instruments for recording, transmission and reproduction of audio Signals and structural parts thereof; apparatus for recording and reproduction of electrical signals, in particular audio signals; apparatus for the remote transmission of acoustic information; audio receivers, in particular multi-channel, single-channel and dual-channel receivers, infrared receivers and radio receivers, headphone receivers, stethoset receivers and structural parts for the aforesaid goods; apparat...

Iron oxide in particulate, pellet, and granule form; iron oxide as a dispersion; iron oxide as a sorbent; iron oxide for use in technical applications, namely, air purification, environmental remediation, and water purification; iron oxide for use as an abrasive; iron oxide for use as a catalyst; iron oxide for use as a synergist; iron oxide for use as an additive; iron oxide for use as a pigment; iron oxide