DONALD A. PIERCE, MD
Osteopathic Medicine at San Marin Dr, Novato, CA

4262419, Apr 21, 1981

Jul 6, 1979

6/055345

Donald C. Pierce - Novato CA

B26B 2900

30293

A cutter employing flat replaceable blades and providing a handle and support memeber that is shaped as an annular segment cut off by a planar surface. The blade is held by a shaft which is preferably encircled by a sleeve and locked to it against rotation. The shaft alone or both the shaft and sleeve extend through a horizontal opening parallel to the planar surface and are locked in place at any desired rotational position. The shaft provides a blade-holding channel enabling ready adjustment of the cutting depth of the blade. In addition to straight cuts and freehand cuts, the latter may be used for circular cuts by attaching a radius rod to it. Cuts of limited length can be simplified by use of another attachment. A further attachment is used to make cuts parallel to the edge of the mounting board.

4339877, Jul 20, 1982

Oct 3, 1980

6/193884

Donald C. Pierce - Novato CA

B26B 2900

30293

A cutter employing flat replaceable blades and providing a handle and support member that is shaped as an annular segment cut off by a planar surface. The blade is held by a shaft which is preferably encircled by a sleeve and locked to it against rotation. The shaft alone or both the shaft and sleeve extend through a horizontal opening parallel to the planar surface and are locked in place at any desired rotational position. The shaft provides a blade-holding channel enabling ready adjustment of the cutting depth of the blade. In addition to straight cuts and freehand cuts, the latter may be used for circular cuts by attaching a radius rod to it. Cuts of limited length can be simplified by use of another attachment. A further attachment is used to make cuts parallel to the edge of the mounting board.

4211137, Jul 8, 1980

Jan 29, 1979

6/007007

Donald C. Pierce - Novato CA

B26D 308, B26D 120

83864

Apparatus for cutting stiff sheet material. A straightedge barrier aligns the material. A back supporting the material includes a first bar perpendicular to the straightedge barrier. Along one edge of the first bar is a straight strip blade having a shearing face and a cutting edge making an acute angle with the shearing face, preferably of about 15. degree. On a second bar, spaced from and parallel to the first bar, is a carriage in rolling engagement with the second bar and carrying a series of rotatably supported shearing rollers, preferably at least four. The rollers are substantially coplanar, the axes for the first three lie along a line inclined to the blade and getting successively closer thereto, and are frustoconical at an inclination of about 6. degree. The fourth roller is mounted somewhat closer than it would be if its axis lay along that line and is the only roller which extends beyond the cutting edge into engagement with the shearing face of the blade, being spring-urged thereagainst. The first roller urges the sheet material against the cutting edge, and the succeeding rollers force the shearing action.

4244106, Jan 13, 1981

May 29, 1979

6/043331

Donald C. Pierce - Novato CA

B43L 1104, B26B 300

33 31

A device for describing an ellipse. An enclosed arcuate first slot extends through a cylindrical shell. A path-generating disc fits inside the shell and enables the shell to rotate relatively thereto, and to it is secured a square bottom plate having a plurality of sharp points for centering the device. The disc has a diametrically-extending slot and, perpendicular thereto, a diametrically-extending recess in its upper surface. A cylindrical cam has a path-defining circular projection that rides snugly back and forth in the disc's recess. A cylindrical face of the cam has a radial opening aligned with and leading into another diametrical slot and a tangential opening parallel to that slot. An eccentricity-determining rod fits through the radial opening into the cam's slot, with sliding adjustment; its inner end extends out vertically into the disc's slot, for movement back and forth therealong. A radius rod, having one end secured in the cam's tangential opening, extends out through the shell's slot, and its outer end carries scribing means.

4165408, Aug 21, 1979

Feb 24, 1978

5/881028

Donald C. Pierce - Novato CA

B32B 906

428452

A method for decorating the border panel or any other area of a cardboard picture mat and the product of that method. Boundary lines of ink or other material are drawn to give a desired pattern and to define design areas. Then a finely divided pigmented powder is brushed into the areas which are desired to be colored. The paper surface holds only a limited amount of the powder, and excess powder is removed. The areas may be rubbed down to assure even distribution and to impart a desired brilliance or tone.

4025666, May 24, 1977

Jun 20, 1975

5/588965

Donald Cameron Pierce - Novato CA

B05D 500

427197

A method for decorating the border panel or any other area of a cardboard picture mat and the product of that method. Boundary lines of ink or other material are drawn to give a desired pattern and to define design area. Then a finely divided pigmented powder is brushed into the areas which are desired to be colored. The paper surface holds only a limited amount of the powder, and excess powder is removed. The areas may be rubbed down to assure even distribution and to impart a desired brilliance or tone.

4180407, Dec 25, 1979

Sep 15, 1978

5/942824

Donald M. Gibson - Oakland CA
Donald C. Pierce - Novato CA

C09D 1120, C09D 1114, C09D 1108, C09D 1104

106 26

Ink which is especially suitable for application to or for drawing lines on unglazed or porous surfaces is an aqueous suspension of an opaque, water-insoluble powdered pigment, containing also a binder which forms a flexible film upon drying, and a small amount of surfactant and, if desired, a fungicide.

4161250, Jul 17, 1979

Apr 27, 1978

5/900432

Donald C. Pierce - Novato CA

B05C 1710

206575

A kit having a plurality of containers of finely divided dry powder of different hues, a dry cleaning erasure pad, at least one brush, a plurality of cotton swabs and a pencil eraser. The kit is for the purpose of carrying out the method for decorating the border panel or any other area of a cardboard picture mat. Boundary lines of ink or other material are drawn to give a desired pattern and to define design areas. Then a finely divided pigmented powder is brushed into the areas which are desired to be colored. The paper surface holds only a limited amount of the powder, and excess powder is removed. The areas may be rubbed down to assure even distribution and to impart a desired brilliance or tone.

4027396, Jun 7, 1977

Apr 1, 1976

5/672795

Donald Cameron Pierce - Novato CA

B43L 700

33 96

A marking gauge for measuring and marking desired distances on French mats. The gauge has a sheet shaped as an isosceles right triangle for alignment with a corner of a cutout area. An elongated rectangular member is secured to and overlies the sheet, having a short edge coinciding with the base of the triangle from the midpoint thereof to one 45. degree. vertex thereof and a first long side leading from the midpoint of the base through the 90. degree. vertex, bisecting it. A second long side is parallel to the first long side and extends from the 45. degree. vertex. The rectangular member provides a pocket open along each long side and closed at each end, one end being located precisely directly above the 90. degree. vertex. Inside the pocket is a removable marker scale having index markings along the first long side.