LexDanaLexDanabeta
Inventor

Dennis D. Lam

Inventor
Houston, TX, US

Overview

1→
Patents
2015
Patent span
Fixed constructions
Primary field (CPC E)

Patents· 1 as inventor

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

E21Bprimary
E21BEarth or rock drilling100%
PatentTitleYear
9,121,245'Spherical-annular blowout preventer having a plurality of pistons'2015

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2015Patents assigned to ZP INTERESTS LLC (1)· patent assignee history
2015Based in Houston, TX, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
ZP INTERESTS LLC12015
Locations
LocationPatentsSpan
Houston, Texas, US12015