David Root has been granted 11 US patents while listed as an inventor at Costar Group . The first was granted in 1990 and the most recent in December 2015. David Root ranks #435,149 of 4,157,543 US inventors in our database (top 10.5%). Patent records list David Root in Lexington, MA, US.
Patents per Year Patents granted per year, 1990 to 2015 Bar chart with a peak of 2 patents in 1990. peak 2 1990: 2 patents 1990 1991: 1 patents 1991 1992: 1 patents 1992 1993: 2 patents 1993 1995: 1 patents 1995 1996: 1 patents 1996 1997: 1 patents 1997 2014: 1 patents 2014 2015: 1 patents 2015
Issued Patents All Time
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Showing 1–11 of 11 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
9216263 Breath intake valve — 2015-12-22
8800565 Breath intake valve for a tracheostomy tube — 2014-08-12
5650323 System for growing and manipulating tissue cultures using 96-well format equipment — 1997-07-22
5516564 Sterile irradiated hydrophobic pipette tip Lewis Lawton 1996-05-14
5466602 Apparatus for growing tissue cultures in vitro George Lyman , Gregory Mathus 1995-11-14
5272083 Culture device and method of use having a detachable cell or tissue growth surface David E. Butz , George Lyman , Gregory Mathus 1993-12-21
5215920 Apparatus for growing tissue cultures in vitro George Lyman , Gregory Mathus 1993-06-01
$1,620,000
5139951 Culture device having a detachable cell or tissue growth surface David E. Butz , George Lyman , Gregory Mathus 1992-08-18
$1,953,000
5026649 Apparatus for growing tissue cultures in vitro George Lyman , Gregory Mathus 1991-06-25
$1,620,000
4948564 Multi-well filter strip and composite assemblies George Lyman 1990-08-14
$1,116,000
4895706 Multi-well filter strip and composite assemblies George Lyman 1990-01-23
$535,000