Inventor

Preston R. Fox

Inventor

Fountain Valley, CA, US

Overview

12→

Patents

1984–2018

Patent span

Fixed constructions

Primary field (CPC E)

Patents· 12 as inventor

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

E21Bprimary

E21BEarth or rock drilling71%

B25JManipulators12%

B65GTransport or storage devices, e.g. conveyors for loading or tipping, shop conveyor systems or pneumatic tube conveyors6%

B66FHoisting, lifting, hauling or pushing, not otherwise provided for, e.g. devices which apply a lifting or pushing force directly to the surface of a load6%

Y10TTechnical subjects covered by former us classification6%

PatentTitleYear

10,081,110Self-aligning pipe gripping assembly and method of making and using the same2018 9,452,535'Self-aligning pipe gripping assembly and method of making and using the same'2016 8,752,653'Dual ball upper internal blow out preventer valve'2014 7,748,473'Top drives with shaft multi-seal'2010 7,748,445'Top drive with shaft seal isolation'2010 7,401,664'Top drive systems'2008 7,313,986'Tubular-drill bit connect/disconnect apparatus'2008 7,188,547'Tubular connect/disconnect apparatus'2007 7,165,619'Subsea intervention system, method and components thereof'2007 7,062,991'Tubular connect/disconnect apparatus'2006 5,451,129'Pipe transfer system'1995 4,478,111'Suspension of adjustable pipe spinner'1984

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1984–2008Patents assigned to VARCO INT (6)· patent assignee history

1984–2018Based in Fountain Valley, CA, US· patent location history

2007Based in The Woodlands, TX, US· patent location history

2010–2018Patents assigned to NAT OILWELL VARCO LP (5)· patent assignee history

2014Patents assigned to BRAMAN ARTHUR W (1)· patent assignee history

2014Patents assigned to FOX PRESTON R (1)· patent assignee history

2014Patents assigned to SENEVIRATNE PADMASIRI DAYA (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
VARCO INT	6	1984–2008
NAT OILWELL VARCO LP	5	2010–2018
BRAMAN ARTHUR W	1	2014
FOX PRESTON Rself	1	2014
SENEVIRATNE PADMASIRI DAYA	1	2014

Locations

Location	Patents	Span
Fountain Valley, California, US	11	1984–2018
The Woodlands, Texas, US	1	2007