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Inventor

David Steffens

Inventor
Oklahoma City, OK, US

Overview

3→
Patents
2011–2013
Patent span
Physics
Primary field (CPC G)

Patents· 3 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G10Dprimary
G10DStringed musical instruments33%
G10GRepresentation of music33%
A61PSpecific therapeutic activity of chemical compounds or medicinal preparations17%
G01NInvestigating or analysing materials by determining their chemical or physical properties17%
PatentTitleYear
8,461,438'Harp stand and methods of use thereof'20138,394,354'Biomarkers for depression and methods using the same'20137,994,407'Harp stand and methods of use thereof'2011

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2011–2013Patents assigned to LEBLANC GAYE (2)· patent assignee history
2011–2013Patents assigned to STEFFENS DAVID (2)· patent assignee history
2011–2013Patents assigned to STEWART II MICHAEL K (2)· patent assignee history
2011–2013Based in Oklahoma City, OK, US· patent location history
2013Patents assigned to EVANS ANNE (1)· patent assignee history
2013Patents assigned to HARVAN DON (1)· patent assignee history
2013Based in Durham, NC, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
LEBLANC GAYE22011–2013
STEFFENS DAVIDself22011–2013
STEWART II MICHAEL K22011–2013
EVANS ANNE12013
HARVAN DON12013
Locations
LocationPatentsSpan
Oklahoma City, OK, US22011–2013
Durham, NC, US12013