Inventor
David A. Welsh
Inventor
Monroeville, PA, US
Overview
Patents· 7 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C08Fprimary
C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds9%
C08LCompositions of macromolecular compounds9%
C09DCoating compositions, e.g. paints, varnishes or lacquers9%
E21BEarth or rock drilling9%
G01VGeophysics9%
Y10TTechnical subjects covered by former us classification9%
B29DProducing particular articles from plastics or from substances in a plastic state5%
B60CVehicle tyres5%
C07DHeterocyclic compounds5%
F16BDevices for fastening or securing constructional elements or machine parts together, e.g. nails, bolts, circlips, clamps, clips or wedges5%
PatentTitleYear
10,760,410Stitching methods to enhance beamforming results202010,365,389MEMS-based transducers on a downhole tool20195,381,190'Low vision lens assembly with adhesive coupling ring'19954,632,957'Ethylenically unsaturated ethylene and propylene ureas containing alkylene urea groups or alkylene urethane groups, useful in coating compositions'19864,629,960'Induction motor controller'19864,380,601'Thermosetting catonic acrylic latices and their use in coating compositions'19834,209,594'Thermoplastic elastomer blends having improved resistance to oil'1980Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1980Patents assigned to ARCO POLYMERS INC (1)· patent assignee history
1980–1986Based in Monroeville, PA, US· patent location history
1983–1986Patents assigned to PPG INDUSTRIES INC (2)· patent assignee history
1986Patents assigned to ENERGY MOTOR CONTROL INC (1)· patent assignee history
1986–1995Based in Largo, FL, US· patent location history
1995Patents assigned to UNILENS CORP USA (1)· patent assignee history
2019–2020Patents assigned to HALLIBURTON ENERGY SERVICES INC (2)· patent assignee history
2019–2020Based in League City, TX, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HALLIBURTON ENERGY SERVICES INC | 2 | 2019–2020 |
| PPG INDUSTRIES INC | 2 | 1983–1986 |
| ARCO POLYMERS INC | 1 | 1980 |
| ENERGY MOTOR CONTROL INC | 1 | 1986 |
| UNILENS CORP USA | 1 | 1995 |
Locations
| Location | Patents | Span |
|---|---|---|
| Monroeville, Pennsylvania, US | 3 | 1980–1986 |
| League City, Texas, US | 2 | 2019–2020 |
| Largo, Florida, US | 2 | 1986–1995 |