Patents by Inventor Antero Anttila

Antero Anttila 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).

  • Rock drilling method
    Patent number: 4341271
    Abstract: A rock drilling method according to which the drill is subjected to successive axial strikes and is rotated around its longitudinal axis. The direction of rotation is repeatedly reversed after the drill has rotated at least one revolution in one direction.
    Type: Grant
    Filed: April 22, 1980
    Date of Patent: July 27, 1982
    Assignee: OY. Tampella AB
    Inventor: Antero Anttila