Inventor
YOKOYAMA TOMOTAKA
JP9 patents
⚠️ This page may combine multiple inventors who share the name “YOKOYAMA TOMOTAKA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HOYA CORP
7 patentsUS6670055B2Dec 30, 2003
Magnetic recording medium and manufacturing method therefor
HOYA CORP87 citations97
US6852010B2Feb 8, 2005
Substrate for an information recording medium, information recording medium using the substrate, and method of producing the substrate
HOYA CORP16 citations92
US6537648B1Mar 25, 2003
Substrate for an information recording medium, information recording medium using the substrate and method of producing the substrate
HOYA CORP42 citations92
US6706427B2Mar 16, 2004
Management technique of friction coefficient based on surface roughness, substrate for information recording medium, information recording medium and manufacture method thereof
HOYA CORP17 citations89
US6790509B2Sep 14, 2004
Substrate for information recording medium, information recording medium, and method for controlling surface of substrate for information recording medium
HOYA CORP11 citations73
US8033008B2Oct 11, 2011
Method for supporting manufacture of a magnetic disk
HOYA CORP0 citations49
US7220446B2May 22, 2007
Management technique of friction coefficient based on surface roughness, substrate for information recording medium, information recording medium and manufacture method thereof
HOYA CORP0 citations49