LexDanaLexDanabeta
Inventor

Robert Jen-Yue Du

Inventor
Houston, TX, US

Overview

6→
Patents
2013–2020
Patent span
Fixed constructions
Primary field (CPC E)

Patents· 6 as inventor

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

E21Bprimary
E21BEarth or rock drilling44%
B60NSeats specially adapted for vehicles22%
F16JPistons22%
Y10TTechnical subjects covered by former us classification11%
PatentTitleYear
10,822,907Wellbore seal energizing ring with retaining feature202010,233,711Wellbore seal energizing ring with retaining feature20199,982,503Wellhead metal seal with energizing ring having trapped fluid reliefs20189,732,582'Wellbore sealing with hybrid wicker system'20178,955,910'Recliner swing-gate control spacer'20158,434,823'Reclining seat assembly'2013

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2013Patents assigned to BROWN JERRY R (1)· patent assignee history
2013Patents assigned to DU ROBERT (1)· patent assignee history
2013Patents assigned to FERRAIUOLO PAUL G (1)· patent assignee history
2013–2015Based in Canton, MI, US· patent location history
2017–2020Patents assigned to VETCO GRAY INC (4)· patent assignee history
2017–2020Based in Houston, TX, US· patent location history
2018–2020Patents assigned to VETCO GRAY LLC (3)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
VETCO GRAY INC42017–2020
VETCO GRAY LLC32018–2020
BROWN JERRY R12013
DU ROBERTself12013
FERRAIUOLO PAUL G12013
Locations
LocationPatentsSpan
Houston, Texas, US42017–2020
Canton, MI, US22013–2015