Patents Assigned to Minnesota Micro Metal, Inc.
  • Method of making an abrading material
    Patent number: 4264410
    Abstract: A metal abrading material formed from acid etching with a resist pattern comprising a plurality of polygonal shapes with accentuated corners dispersed in a pattern chosen to intermix cutting points with planing edges.
    Type: Grant
    Filed: January 22, 1980
    Date of Patent: April 28, 1981
    Assignee: Minnesota Micro Metal, Inc.
    Inventor: John J. Frantzen
  • Abrading material
    Patent number: 4240806
    Abstract: A metal abrading material formed from acid etching with a resist pattern comprising a plurality of polygonal shapes with accentuated corners dispersed in a pattern chosen to intermix cutting points with planing edges.
    Type: Grant
    Filed: August 16, 1978
    Date of Patent: December 23, 1980
    Assignee: Minnesota Micro Metal, Inc.
    Inventor: John J. Frantzen
  • Etched metal abrasives
    Patent number: 4236357
    Abstract: An etched metal abrasive formed from a laminated sheet of steel having a top layer of high carbon steel and a base layer of low carbon steel.
    Type: Grant
    Filed: May 8, 1979
    Date of Patent: December 2, 1980
    Assignee: Minnesota Micro Metal, Inc.
    Inventor: John J. Frantzen
  • Abrasive tool
    Patent number: 4221084
    Abstract: An abrasive tool having a base portion with etched metal abrasive thereon and a handle portion adapted to snap onto the base in two alternate positions, one position being tight for using the etched metal abrasive and the other position being raised slightly to accomodate, between the handle and the base, a piece of sandpaper wrapped around the base.
    Type: Grant
    Filed: September 18, 1978
    Date of Patent: September 9, 1980
    Assignee: Minnesota Micro Metal, Inc.
    Inventor: John J. Frantzen