Daniel D. Leffel — 5 Patents at AT&T

Daniel D. Leffel has been granted 5 US patents while listed as an inventor at AT&T. The first was granted in 1984 and the most recent in January 2006. Daniel D. Leffel ranks #907,971 of 4,157,543 US inventors in our database (top 21.8%). Patent records list Daniel D. Leffel in Pottstown, PA, US.

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
6989552	Method for making an integrated circuit device with dielectrically isolated tubs and related circuit	Charles Arthur Goodwin, William R. Lewis	2006-01-24	$7,510,000
6500717	Method for making an integrated circuit device with dielectrically isolated tubs and related circuit	Charles Arthur Goodwin, William R. Lewis	2002-12-31
4870029	Method of forming complementary device structures in partially processed dielectrically isolated wafers	William Easter	1989-09-26
4820653	Technique for fabricating complementary dielectrically isolated wafer	William Easter	1989-04-11
4466852	Method and apparatus for demounting wafers	Richard K. Beltz, Donald M. Large	1984-08-21

Daniel D. Leffel — 5 Patents

Issued Patents All Time

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