Inventor
SEKIGUCHI KAZUHIKO
JP10 patents
⚠️ This page may combine multiple inventors who share the name “SEKIGUCHI KAZUHIKO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ZEBRA CO LTD
6 patentsUS4815880AMar 28, 1989
Card type writing instrument
ZEBRA CO LTD43 citations92
US4283151AAug 11, 1981
Compound writing instrument
ZEBRA CO LTD20 citations81
USD307920SMay 15, 1990
Protective end cap for a ball point pen
ZEBRA CO LTD11 citations73
US4268183AMay 19, 1981
Composite writing instrument
ZEBRA CO LTD15 citations73
US5482393AJan 9, 1996
Corrector
ZEBRA CO LTD12 citations66
US4270869AJun 2, 1981
Composite writing instrument
ZEBRA CO LTD5 citations62
HOYA CORP
4 patentsUS5654057AAug 5, 1997
Sheet glass flattening method, method of manufacturing glass substrate for an information recording disk using flattened glass, method of manufacturing a magnetic recording disk using glass substrate, and magnetic recording medium
HOYA CORP143 citations97
US5725625AMar 10, 1998
Method of manufacturing a magnetic recording disk using glass substrate
HOYA CORP76 citations94
US5916656AJun 29, 1999
Sheet glass flattening method, method of manufacturing an information recording glass substrate using flattened glass, method of manufacturing a magnetic disk using glass substrate, and magnetic recording medium
HOYA CORP47 citations93
US5681609AOct 28, 1997
Method of manufacturing a magnetic recording disk
HOYA CORP22 citations91