FT

Frederick N. Trofimenkoff

WE Weatherford/Lamb: 3 patents #218 of 852Top 30%
UN Unknown: 2 patents #12,644 of 83,584Top 20%
CO Comcast: 1 patents #2,409 of 4,447Top 55%
📍 Calgary, CA: #383 of 5,407 inventorsTop 8%
Overall (All Time): #522,786 of 4,157,543Top 15%
10
Patents All Time

Issued Patents All Time

Showing 1–10 of 10 patents

Patent #TitleCo-InventorsDate
7093680 Subsurface signal transmitting apparatus Marvin L. Holbert, James W. Haslett, Robert E. Smallwood 2006-08-22
6672383 Subsurface signal transmitting apparatus Marvin L. Holbert, James W. Haslett, Robert E. Smallwood 2004-01-06
6405795 Subsurface signal transmitting apparatus Marvin L. Holbert, James W. Haslett, Robert E. Smallwood 2002-06-18
6209632 Subsurface signal transmitting apparatus Marvin L. Holbert, James W. Haslett, Robert E. Smallwood 2001-04-03
5909132 Resistance bridge and its use in conversion systems Faramarz Sabouri, James W. Haslett 1999-06-01
5877637 Resistance bridge and its use in conversion systems Faramarz Sabouri, James W. Haslett 1999-03-02
4847620 Clock-controlled voltage-to-frequency converter Chun O. Li, Daniel John Paslawski 1989-07-11
4827261 Clock-controlled pulse width modulator Daniel John Paslawski, Chun O. Li 1989-05-02
4558301 Voltage-to-frequency and analog-to-digital converter circuit Jai Bhagwan, Sandro P. Poscente 1985-12-10
4235050 Skate sharpening apparatus James H. Hannaford, Warren L. Myrfield, David H. Weiler, Joseph A. Consay, Donald M. Dobie 1980-11-25