G
SECTION G — PHYSICS
 G

Note(s)

  1. In this section, the following term is used with the meaning indicated:
    • "variable" (as a noun) means a feature or property (e.g., a dimension, a physical condition such as temperature, a quality such as density or colour) which, in respect of a particular entity (e.g., an object, a quantity of a substance, a beam of light) and at a particular instant, is capable of being measured; the variable may change, so that its numerical expression may assume different values at different times, in different conditions or in individual cases, but may be constant in respect of a particular entity in certain conditions or for practical purposes (e.g., the length of a bar may be regarded as constant for many purposes).
  2. Attention is drawn to the definitions of terms or expressions used, appearing in the notes of several of the classes in this section, in particular those of "measuring" in class G01 and "control" and "regulation" in class G05.
  3. Classification in this section may present more difficulty than in other sections, because the distinction between different fields of use rests to a considerable extent on differences in the intention of the user rather than on any constructional differences or differences in the manner of use, and because the subjects dealt with are often in effect systems or combinations, which have features or parts in common, rather than "things", which are readily distinguishable as a whole. For example, information (e.g., a set of figures) may be displayed for the purpose of education or advertising (G09), for enabling the result of a measurement to be known (G01), for signalling the information to a distant point or for giving information which has been signalled from a distant point (G08). The words used to describe the purpose depend on features that may be irrelevant to the form of the apparatus concerned, for example, such features as the desired effect on the person who sees the display, or whether the display is controlled from a remote point. Again, a device which responds to some change in a condition, e.g., in the pressure of a fluid, may be used, without modification of the device itself, to give information about the pressure (G01L) or about some other condition linked to the pressure (another subclass of class G01, e.g., G01K for temperature), to make a record of the pressure or of its occurrence (G07C), to give an alarm (G08B), or to control another apparatus (G05).

    The classification scheme is intended to enable things of a similar nature (as indicated above) to be classified together. It is therefore particularly necessary for the real nature of any technical subject to be decided before it can be properly classified.

  
INSTRUMENTS
 G03
PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY (reproduction of pictures or patterns by scanning and converting into electrical signals H04N)  [4]
 G03

Note(s)

In this class, the following terms are used with the meaning indicated:

  • "records" means photographs or any other kind of latent, directly-visible or permanent storage of pictorial information, which consist of an imagewise distribution of a quantity, e.g. an electric charge pattern, recorded on a carrier member;
  • "optical" applies not only to visible light but also to ultra-violet or infra-red radiations.  [4]

 G03B
APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D)  [4]
 G03B

Note(s)

This subclass covers, as far as processes are concerned, only processes characterised by the use or manipulation of apparatus classifiable per se in this subclass.

 G03B
Subclass index
DETAILS
Common to at least two of cameras, projectors and printers 1/00 - 5/00
Common to cameras only
exposure, control thereof 7/00, 9/00
viewfinders, focusing aids 13/00
filters; constructional details, accessories 11/00; 17/00
special procedures for taking photographs 15/00
Common to projectors only 21/00, 23/00
Common to printers only 27/00
APPARATUS
Cameras 19/00
Projectors, viewers; devices for changing pictures 21/00, 25/00; 23/00
Printing apparatus 27/00
Combinations with other apparatus 29/00
SPECIAL TECHNIQUES
Associated working with sound apparatus 31/00
Colour photography; stereoscopic photography; panoramic photography; high-speed photography 33/00; 35/00; 37/00; 39/00
Other techniques 41/00
Using waves other than optical waves, visualisation 42/00
TESTING 43/00

 G03C
PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES (for photomechanical purposes G03F); PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY (photographic processes characterised by the use or manipulation of apparatus classifiable per se in subclass G03B, see G03B; photomechanical production of textured or patterned surfaces G03F; electrography, electrophotography, magnetography G03G)
 G03C

Note(s)

In this subclass, the following expressions are used with the meanings indicated:

  • "photosensitive compositions" covers photosensitive substances, e.g. silver halides, and, if applicable, binders or additives;
  • "photosensitive materials" covers the photosensitive compositions, e.g. emulsions, the bases carrying them, and, if applicable, auxiliary layers.  [5]

 G03C
Subclass index
PHOTOGRAPHIC PROCESSES
General 5/00, 11/00
For colour photography 7/00
For diffusion transfer processes 8/00
For stereo-photography and the like 9/00
PHOTOSENSITIVE COMPOSITIONS AND MATERIALS 1/00
PACKAGING 3/00

 G03D
APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS (apparatus specially adapted for photomechanical production of textured or patterned surfaces G03F); ACCESSORIES THEREFOR (photosensitive materials or processes for photographic purposes G03C; electrographic, electrophotographic, or magnetographic methods or apparatus G03G)
 G03D
Subclass index
APPARATUS FOR PROCESSING EXPOSED MATERIAL
Liquid; gas; diffusion processing apparatus 3/00, 5/00; 7/00; 9/00
Reversal processing apparatus 11/00
Other apparatus and accessories 13/00
APPARATUS FOR TREATING PROCESSED MATERIAL 15/00
DARK-ROOMS 17/00

 G03F
PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR (phototypographic composing devices B41B; photosensitive materials or processes for photographic purposes G03C; electrography, sensitive layers or processes G03G)
 G03F

Note(s)

In this subclass, the following terms or expressions are used with the meanings indicated:

  • "photosensitive" means not only sensitive of electromagnetic radiation but also to corpuscular radiation;
  • "photosensitive compositions" covers photosensitive substances, e.g. quinonediazides, and, if applicable, binders or additives;
  • "photosensitive materials" covers the photosensitive compositions, e.g. photoresists, the bases carrying them and, if applicable, auxiliary layers.  [5]


 G03G
ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY (information storage based on relative movement between record carrier and transducer G11B; static stores with means for writing-in or reading-out information G11C; recording of television signals H04N 5/76)
 G03G

Note(s)

  1. This subclass covers:
    • the production of permanent directly-visible pictures in conformity with an original picture or document, using an intermediate imagewise distribution of an electric or magnetic quantity, such as a charge pattern, an electric conductivity pattern, or a magnetic pattern;
    • the production of permanent directly-visible pictures using an intermediate imagewise distribution of an electric or magnetic quantity, when the origin and the way of generating said intermediate distribution are not relevant.
  2. This subclass does not cover:
 G03G
Subclass index
ORIGINAL RECORDING, MEMBERS AND MATERIALS 5/00, 7/00, 9/00
ELECTROGRAPHIC PROCESSES AND APPARATUS
Using a charge pattern 13/00, 15/00
Using patterns other than charge patterns 17/00
Using deformation of thermoplastic layers 16/00
PROCESSES AND APPARATUS USING MAGNETIC PATTERNS 19/00
DETAILS NOT OTHERWISE PROVIDED FOR 8/00, 11/00, 21/00

 G03H
HOLOGRAPHIC PROCESSES OR APPARATUS (holograms, e.g. point holograms, used as ordinary optical elements G02B 5/32; producing stereoscopic or other three-dimensional effects G02B 27/22; diffraction-grating systems G02B 27/42; systems using moire fringes G02B 27/60; optical logic elements G02F 3/00; stereo-photography G03B 35/00; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D; analogue computers performing mathematical operations with the aid of optical elements G06E 3/00; authentication, by radiation, of concealed information carried by holograms or diffraction gratings G06K 19/14; holographic storage G11B 7/00, G11C 13/04)  [2]
 G03H

Note(s)

This subclass covers means for producing a record of the phase and amplitude information of a wave-front, which information can be used to reconstruct the original wave-front, or means to reconstruct the original wave-front from a record containing the phase and amplitude information of the wave-front.  [2]