Inventor
SUMIDA TAKASHI
JP12 patents
⚠️ This page may combine multiple inventors who share the name “SUMIDA TAKASHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI MAXELL
8 patentsUS6125012ASep 26, 2000
Recording medium cartridge with a twin-coiled torsional spring-biased shutter
HITACHI MAXELL22 citations91
US5893527AApr 13, 1999
Single-reel tape cartridge
HITACHI MAXELL49 citations91
US4660784AApr 28, 1987
Tap cartridge
HITACHI MAXELL19 citations80
US4635879AJan 13, 1987
Tape cassette
HITACHI MAXELL9 citations71
US5647550AJul 15, 1997
Tape cartridge reel lock mechanism
HITACHI MAXELL2 citations61
US5451007ASep 19, 1995
Tape cartridge reel lock mechanism
HITACHI MAXELL4 citations61
US4643304AFeb 17, 1987
Tape cartridge with extending reference surfaces
HITACHI MAXELL6 citations61
US4757957AJul 19, 1988
Tape cartridge
HITACHI MAXELL4 citations55