P

Inventor

SHIMIZU AKIHIKO

JP84 patents
⚠️ This page may combine multiple inventors who share the name “SHIMIZU AKIHIKO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

TOYO SODA MFG CO LTD

14 patents
US4200538AApr 29, 1980

Process for preparing cation-exchange membrane

TOYO SODA MFG CO LTD25 citations82
US4081419AMar 28, 1978

Process for producing a polymer emulsion

TOYO SODA MFG CO LTD20 citations82
US4031302AJun 21, 1977

Process for preparing granular rubber

TOYO SODA MFG CO LTD21 citations81
US4128706ADec 5, 1978

Carrier for liquid chromatography

TOYO SODA MFG CO LTD12 citations74
US4065414ADec 27, 1977

Polyion complex and polyion complex film

TOYO SODA MFG CO LTD7 citations74
US4054547AOct 18, 1977

Polymerization of chloroprene

TOYO SODA MFG CO LTD13 citations74
US4013580AMar 22, 1977

Method of preventing formation of popcorn chloroprene polymer

TOYO SODA MFG CO LTD8 citations74
US4194999AMar 25, 1980

Process for producing powdery rubber

TOYO SODA MFG CO LTD18 citations73
US4189540AFeb 19, 1980

Process for producing cation exchange membrane by impregnating a diene monomer having carboxylic acid groups into a fluorinated membrane having cation exchange groups and polymerizing

TOYO SODA MFG CO LTD11 citations73
US4174426ANov 13, 1979

Method of improving characteristic of cation-exchange membrane by swelling in water miscible organic solvent and treating further with hydrochloric acid

TOYO SODA MFG CO LTD14 citations73
US4154909AMay 15, 1979

Process for producing cation exchange membrane by treatment of fluorinated polymer containing sulfonyl halide groups with amine and vinyl monomer

TOYO SODA MFG CO LTD7 citations73
US4148979AApr 10, 1979

Method of improving characteristics of cation-exchange membrane by swelling in water miscible organic solvent

TOYO SODA MFG CO LTD12 citations73
US4136237AJan 23, 1979

Process for preparing cation-exchange membrane by polymerizing lactone ring containing unsaturated monomer in the presence of fluorinated polymer

TOYO SODA MFG CO LTD13 citations73
US4132682AJan 2, 1979

Process for preparing cation-exchange membrane

TOYO SODA MFG CO LTD17 citations73

RICOH KK

13 patents
US6487149B1Nov 26, 2002

Optical recording and reproducing methods for optical disk

RICOH KK88 citations98
US5737307AApr 7, 1998

Method for recording-regenerating information from optical recording mediums

RICOH KK76 citations96
US5638354AJun 10, 1997

Optical information recording medium

RICOH KK50 citations96
US5926446AJul 20, 1999

Optical information recording medium and a method of tracking servo for optical information recording medium

RICOH KK43 citations93
US5812520ASep 22, 1998

Optical disk unit, control method thereof, optical information recording medium and recording-regenerating method using this optical information recording medium

RICOH KK26 citations93
US5344683ASep 6, 1994

Optical information recording medium with phase grooves in land portions of information recording areas

RICOH KK26 citations93
US5220556AJun 15, 1993

Optical disk with identification phase-encoded area

RICOH KK29 citations93
US7126897B2Oct 24, 2006

Multi-level information recording apparatus, multi-level information recording method, multi-level information recording medium and multi-level information recording-reproducing apparatus

RICOH KK25 citations92
US6127100AOct 3, 2000

Method of manufacturing a stamper for use in optical information recording medium

RICOH KK18 citations84
US6888479B2May 3, 2005

Data processing method, circuit, and apparatus with increased accuracy

RICOH KK15 citations83
US7027375B2Apr 11, 2006

Multi-value data recording and reproducing device

RICOH KK9 citations74
US6714230B2Mar 30, 2004

Method for optically recording information on an optically re-writable information medium

RICOH KK7 citations74
US7082091B2Jul 25, 2006

Information reproducing method judging a multivalued level of a present cell by referring to judged multivalued levels of a preceding cell and an ensuing cell

RICOH KK7 citations73

INOUE JAPAX RES

8 patents

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD

5 patents

JAPAX INC

4 patents

PACIFIC ENG

2 patents

KONAMI DIGITAL ENTERTAINMENT

1 patent

INOUE JAPAX RESEARCH INC AND J

1 patent

SEITA TORU

1 patent

PACIFIC ENGINEERING CORP

1 patent

Showing the top 50 of 84 patents by PatentIndex Score.