Inventor
TSUGAYA HITOSHI
JP10 patents
⚠️ This page may combine multiple inventors who share the name “TSUGAYA HITOSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
DAICEL CHEM
7 patentsUS5947127ASep 7, 1999
Tobacco filters and method of producing the same
DAICEL CHEM70 citations93
US5967149AOct 19, 1999
Tobacco filter material and a method of producing the same
DAICEL CHEM17 citations91
US5707522AJan 13, 1998
Permselective membrane of polyacrylonitrile copolymer and process for producing the same
DAICEL CHEM32 citations90
US5706833AJan 13, 1998
Tobacco filters and method of producing the same
DAICEL CHEM22 citations90
US4279846AJul 21, 1981
Process for preparing semipermeable membrane having selective permeability
DAICEL CHEM9 citations73
US5711322AJan 27, 1998
Tobacco filter material and a method of producing the same
DAICEL CHEM14 citations72
US5554292ASep 10, 1996
Permselective membrane of polyacrylonitrile copolymer and process for producing the same
DAICEL CHEM18 citations71