Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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David B. Spratt — 19 Patents

TITexas Instruments: 18 patents #710 of 12,488Top 6%
Plano, TX: #338 of 4,842 inventorsTop 7%
Texas: #7,372 of 125,132 inventorsTop 6%
Overall (All Time): #229,345 of 4,157,543Top 6%
19 Patents All Time
David B. Spratt has been granted 19 US patents while listed as an inventor at Texas Instruments. The first was granted in 1986 and the most recent in April 2003. David B. Spratt ranks #229,345 of 4,157,543 US inventors in our database (top 5.5%). Patent records list David B. Spratt in Plano, TX, US.

Patents per Year

Patents granted per year, 1986 to 2003Bar chart with a peak of 6 patents in 1991.peak 61986: 1 patents19861989: 2 patents19891990: 4 patents19901991: 6 patents19911994: 2 patents19941995: 1 patents19952000: 2 patents20002003: 1 patents2003

Issued Patents All Time

Showing 1–19 of 19 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
6548337 Method of manufacturing a high gain bipolar junction transistor with counterdoped base in CMOS technology Chi-Cheong Shen, Michael D. Aragon, Kamel Benaissa 2003-04-15 $18,304,000
6143594 On-chip ESD protection in dual voltage CMOS Alwin Tsao, Vikas Gupta, Gregory Charles Baldwin, E. Ajith Amerasekera, Timothy A. Rost 2000-11-07 $74,234,000
6137144 On-chip ESD protection in dual voltage CMOS Alwin Tsao, Vikas Gupta, Gregory Charles Baldwin, E. Ajith Amerasekera, Timothy A. Rost 2000-10-24 $69,122,000
5434432 Antifuse device for controlling current in a circuit using an antifuse Kueing-Long Chen 1995-07-18 $9,283,000
5316957 Method of forming a recessed contact bipolar transistor Robert L. Virkus, Robert H. Eklund, Eldon J. Zorinsky 1994-05-31 $5,395,000
5284788 Method and device for controlling current in a circuit Kueing-Long Chen 1994-02-08 $7,153,000
5075241 Method of forming a recessed contact bipolar transistor and field effect device Robert L. Virkus, Robert H. Eklund, Eldon J. Zorinsky 1991-12-24 $5,194,000
5065209 Bipolar transistor fabrication utilizing CMOS techniques Rajiv Shah 1991-11-12 $3,233,000
5041394 Method for forming protective barrier on silicided regions Robert H. Eklund 1991-08-20 $3,911,000
5019525 Method for forming a horizontal self-aligned transistor Robert L. Virkus, Eldon J. Zorinsky 1991-05-28 $2,901,000
4985744 Method for forming a recessed contact bipolar transistor and field effect transistor Robert L. Virkus, Robert H. Eklund, Eldon J. Zorinsky 1991-01-15 $5,596,000
4982263 Anodizable strain layer for SOI semiconductor structures Eldon J. Zorinsky, Robert L. Virkus, Kenneth E. Bean, Richard L. Yeakley 1991-01-01
4962053 Bipolar transistor fabrication utilizing CMOS techniques Rajiv Shah 1990-10-09 $4,559,000
4897703 Recessed contact bipolar transistor and method Robert L. Virkus, Robert H. Eklund, Eldon J. Zorinsky 1990-01-30 $3,145,000
4897698 Horizontal structure thin film transistor Eldon J. Zorinsky, James D. Guillory 1990-01-30 $3,145,000
4891103 Anadization system with remote voltage sensing and active feedback control capabilities Eldon J. Zorinsky 1990-01-02 $2,365,000
4849370 Anodizable strain layer for SOI semiconductor structures Eldon J. Zorinsky, Robert L. Virkus, Kenneth E. Bean, Richard L. Yeakley 1989-07-18 $2,231,000
4810667 Dielectric isolation using isolated silicon by limited anodization of an N+ epitaxially defined sublayer in the presence of a diffusion under film layer Eldon J. Zorinsky, Richard L. Yeakley 1989-03-07 $1,351,000
4628591 Method for obtaining full oxide isolation of epitaxial islands in silicon utilizing selective oxidation of porous silicon Eldon J. Zorinsky 1986-12-16 $1,763,000