H01F MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
Introduced: September 1968
Last revised: July 1974
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
Description
H01F covers the design, manufacture, and materials of passive electromagnetic devices including permanent magnets, electromagnets, inductors, and transformers. This subclass addresses magnetic core materials, winding configurations, shielding techniques, and the selection of materials based on their magnetic properties such as permeability and saturation characteristics. Applications span power distribution, signal processing, energy storage, and electromagnetic conversion across industrial and consumer electronics.
Additional Content
Magnets used to separate solid materials from other solid materials or fluids Magnetic work holders , Apparatus or processes for degaussing ships Lifting magnets Magnets in electric meters Devices for demagnetising parts of clocks and watches Magnetic record carriers Apparatus or processes specially adapted for manufacturing magnetic record carriers Thin-film magnetic stores Apparatus or processes for threading magnetic cores in digital storage elements Magnets or electromagnets in relays Magnets or electromagnets in dynamo-electric machines Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing dynamo-electric machines, e.g. forming windings prior to mounting into the machine Arrangements for controlling transformers, reactors or choke coils for the purpose of obtaining a desired output Magnetic amplifiers Impedance networks Demagnetising arrangements for color television Acoustic electromechanical transducers having coils or permanent magnets
Related Keywords
17 direct subcodes
Child Classifications
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- H01F 1/00 Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F 10/00 Thin magnetic films, e.g. of one-domain structure
- H01F 13/00 Apparatus or processes for magnetising or demagnetising
- H01F 17/00 Fixed inductances of the signal type
- H01F 19/00 Fixed transformers or mutual inductances of the signal type
- H01F 21/00 Variable inductances or transformers of the signal type
- H01F 27/00 Details of transformers or inductances, in general
- H01F 29/00 Variable transformers or inductances not covered by group
- H01F 3/00 Cores, yokes or armatures
- H01F 30/00 Fixed transformers not covered by group
- H01F 36/00 Transformers with superconductive windings or with windings operating at cryogenic temperatures
- H01F 37/00 Fixed inductances not covered by group
- H01F 38/00 Adaptations of transformers or inductances for specific applications or functions
- H01F 41/00 Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F 5/00 Coils
- H01F 6/00 Superconducting magnets; Superconducting coils
- H01F 7/00 Magnets
Top Applicants
Top 10 applicants by patent filingsfor class H01, 2013–2023, worldwide · Source: EPO PATSTAT
- TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 43,574
- SAMSUNG ELECTRONICS COMPANY KR 42,206
- LG CHEM KR 21,383
- APPLIED MATERIALS US 20,441
- LG ENERGY SOLUTION KR 20,279
- SAMSUNG DISPLAY KR 19,725
- CHINESE ACADEMY OF SCIENCES 19,400
- TOYOTA MOTOR CORPORATION 18,819
- SGCC(STATE GRID CORPORATION OF CHINA) 18,082
- TOKYO ELECTRON JP 17,634