G11B 15/28 through rollers driving by frictional contact with the record carrier, e.g. capstan; Multiple arrangements of capstans or drums coupled to means for controlling the speed of the drive; Multiple capstan systems alternately engageable with record carrier to provide reversal
Full Title
Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function (driving or guiding heads G11B3/00 - G11B7/00, G11B21/00) > Driving; Starting; Stopping; Arrangements for control or regulation thereof > Driving record carriers by members acting directly or indirectly thereon > through rollers driving by frictional contact with the record carrier, e.g. capstan; Multiple arrangements of capstans or drums coupled to means for controlling the speed of the drive; Multiple capstan systems alternately engageable with record carrier to provide reversal
Filing statistics
CPC G11B 15/28 belongs to the parent subclass G11B, which recorded 59,347 patent applications worldwide between 2013 and 2023. Annual filings declined from 7,949 in 2013 to 3,480 in 2023 (-56%). The most active applicants in class G11 are MICRON TECHNOLOGY (12,397 applications), SAMSUNG ELECTRONICS COMPANY (12,238 applications) and SK HYNIX (11,371 applications).
Source: EPO PATSTAT, worldwide filings
3 direct subcodes
Child Classifications
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- G11B 15/29 through pinch-rollers (G11B15/295 takes precedence)
- G11B 15/295 with single capstan or drum simultaneously driving the record carrier at two separate points of an isolated part thereof, e.g. the capstan acting directly on the tape rollers
Top Applicants
Top 10 applicants by patent filingsfor class G11, 2013–2023, worldwide · Source: EPO PATSTAT
- MICRON TECHNOLOGY US 12,397
- SAMSUNG ELECTRONICS COMPANY KR 12,238
- SK HYNIX KR 11,371
- TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 4,601
- INTEL CORPORATION US 3,874
- IBM (INTERNATIONAL BUSINESS MACHINES CORPORATION) US 3,866
- SANDISK TECHNOLOGIES US 3,151
- SK HYNIX 3,143
- SAMSUNG ELECTRONICS COMPANY 3,073
- WESTERN DIGITAL TECHNOLOGIES US 2,961