Patents by Inventor Koichiro Tsunewaki

Koichiro Tsunewaki 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).

  • Hybrid seed production in common wheat using cytoplasmic male sterility
    Patent number: 4680888
    Abstract: Commercial hybrid wheat is produced by growing under a condition of, for example, not less than 14 hours day length (condition A) common wheat variety in which D.sup.2 -type cytoplasma from Aegilops species has been introduced until cytoplasmic male-sterility is induced, producing hybrid seeds by growing in alternating blocks with a pollinator parent with a good combining ability, maintaining the said male-sterile D.sup.2 -type alloplasmic lines by self pollination by growing under condition of, for example, less than 14 hours day length (condition B), and harvesting by growing the said hybrid under condition A or B.
    Type: Grant
    Filed: September 5, 1985
    Date of Patent: July 21, 1987
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Koichiro Tsunewaki, Ichiro Ohtsuka