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Inventor

David J. Sorensen

Inventor
Vancouver, WA, US

Overview

3→
Patents
1981–2007
Patent span
Human necessities
Primary field (CPC A)

Patents· 3 as inventor

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

A44Cprimary
A44CPersonal adornments, e.g. jewellery33%
A61BDiagnosis33%
H03FAmplifiers33%
PatentTitleYear
7,248,109'Method and apparatus for an improved power amplifier'20075,263,968'Apparatus for removing piercing stud clasp'19934,274,416'Method of using a guide for replacement of earrings in pierced ears'1981

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1981–1993Patents assigned to SORENSEN DAVID J (2)· patent assignee history
1981–1993Based in Vancouver, WA, US· patent location history
2007Patents assigned to PELIKAN TECHNOLOGIES INC (1)· patent assignee history
2007Based in Scotts Valley, CA, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
SORENSEN DAVID Jself21981–1993
PELIKAN TECHNOLOGIES INC12007
Locations
LocationPatentsSpan
Vancouver, Washington, US21981–1993
Scotts Valley, California, US12007