Inventor

BIRCH PETER HUGH

GB4 patents

⚠️ This page may combine multiple inventors who share the name “BIRCH PETER HUGH”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

BOC GROUP PLC

2 patents

US6244841B1Jun 12, 2001

Vacuum pumps

BOC GROUP PLC12 citations72

US7214041B2May 8, 2007

Seal assemblies

BOC GROUP PLC9 citations69

DOWDESWELL STEPHEN

1 patent

US8500422B2Aug 6, 2013

Vacuum pump

DOWDESWELL STEPHEN8 citations77

SCHOFIELD NIGEL PAUL

1 patent

US8702407B2Apr 22, 2014

Multistage roots vacuum pump having different tip radius and meshing clearance from inlet stage to exhaust stage

SCHOFIELD NIGEL PAUL2 citations60