US PATENT SUBCLASS 343 / 725
.~ Plural separate diverse type

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


343 /   HD   COMMUNICATIONS: RADIO WAVE ANTENNAS

700 R  DF  ANTENNAS {58}
725.~ Plural separate diverse type {3}
726  DF  .~.~> Including balanced doublet and loop-type antennas
727  DF  .~.~> Including balanced doublet-type antenna
728  DF  .~.~> Including loop-type antenna

DEFINITION

Classification: 343/725

(under subclass 700) Subject matter including two antennas each of different type, whose active radio wave radiating or collecting elements are physically separate and distinct.

(1) Note. When the antennas are, per se, classifiable in different coordinate subclasses directly indented under subclass 700, which provide for different types of antennas such as subclasses 767, 772, and 793, the antennas are deemed "of different type" as used in the above definition. If the antennas are, per se, classifiable in different indented subclasses of one of these coordinate subclasses as here established, they are not classified in this subclass (725), but in the coordinate subclass or the appropriate indented subclass thereunder. For example, a plurality of diverse type doublets would be classified in subclass 794, and a plurality of diverse wave guide type antennas, neither being of the bi-conical horn type, would be classified in subclasses 776+. Antennas falling in different coordinate subclasses directly indented under subclass 700 which subclasses are directed to combinations, are not necessarily of different types. The different types of antennas as the term is here used are established by distinctions in the active portions of the antennas, as opposed to distinctions arising from combining the active antennas with auxiliary structure, such as reflectors, coupling networks, and supports.

(2) Note. The term "physically separate and distinct" requires that the radiating or collecting elements of each antenna be a complete entity, and not share in whole or in part a common radiating or collecting portion. Such subject matter where the collecting or radiating portions are so shared are classified in subclasses 729+, below. However, the sharing of a common support or coupling, or the utilization by one antenna as a coupling element or support for the radiating or collecting element of the other antennas does not preclude classification in this subclasses (725+).

(3) Note. For classification in this subclass, there must be a plurality of antennas. A single antenna composed of structurally different active parts is not here classified. For example, a sleeve type antenna with a rod coaxial with the sleeve the rod and sleeve being connected to opposite terminals of the same line, does not constitute a plurality of antennas, and is classified in subclass 791, below. If each of a plurality of active elements is able to function independently without any of the remaining elements, a plurality of antennas by be present. Separate terminals or lead-in lines particularly with the transmission of a plurality of signals, is also indicative of a plurality of antennas. It may be noted that the utilization of one antenna by another as its feed does not preclude the antennas being considered plural.

SEE OR SEARCH THIS CLASS, SUBCLASS: 720, for an antenna combined with a diverse type art device.

724, for an antenna convertible to an antenna of a different type.

729+, for plural diverse type active antennas having a common radiating or collecting portion. See (2) Note, above.

758, for plural antennas relatively movable for scanning, sweeping or orienting.

770+, for plural slot type antennas.

776+, for plural wave guide type antennas.

794, for diverse type balanced doublet antennas.

796, 797+, 799+, and 810+, for plural balanced doublets.

824, for a planar array of linear antennas.

826+, for plural, fractional, multiple or full wave linear type antennas.

835, for plural active antennas with a reflector.

844, for plural antennas spaced a fractional or full wave length apart. 852, for plural antennas with impedance matching.

853, for plural antennas with a coupling network or impedance in the leadin.

867, for plural loop type antennas.

879, for plural separate antennas with supports.

893, and the Search Notes thereunder for plural antennas in general.

904+, for antennas combined with other perfecting structure not elsewhere provided for.