Patents by Inventor Wataru Yanagita

Wataru Yanagita has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Steel Material and Process for Producing the Same
    Publication number: 20090110589
    Abstract: A steel material of 85 to 95 HRB exhibiting a ratio of area occupied by ferrite of 30% or higher, which steel material comprises given amounts of C, Si, Mn, S, Ti, Cr, Al and B and the balance of iron and unavoidable impurities, is subjected to induction hardening. After the hardening, the surface of the steel material exhibits an Hv value of 640 to 730. When t refers to the effective hardening depth, namely, the distance from the surface to a region exhibiting an Hv value of 392 and r refers to the radius of the steel material, the hardened layer ratio, t/r, is 0.4 or higher.
    Type: Application
    Filed: October 11, 2006
    Publication date: April 30, 2009
    Inventors: Yoshimi Usui, Yutaka Sato, Masahiko Igarashi, Wataru Yanagita, Hideo Watanabe, Satoru Nakamyo