WELLHEADS PARTS THEREOF

Brand Owner (click to sort) Address Description
"BREWSTER" W-K-M WELLHEAD SYSTEMS, INC. WELLHEADS AND PARTS THEREOF, INCLUDING CASING HEADS, CASING HEAD SPOOLS, SLIP ASSEMBLIES, TUBING HANGERS, TUBING HEADS, TUBING HEAD ADAPTERS, DRILLING CONTROL MANIFOLDS, AND CHRISTMAS TREE ASSEMBLIES;
B W-K-M WELLHEAD SYSTEMS, INC. WELLHEADS AND PARTS THEREOF, INCLUDING CASING HEADS, CASING HEAD SPOOLS, SLIP ASSEMBLIES, TUBING HANGERS, TUBING HEADS, TUBING HEAD ADAPTERS, DRILLING CONTROL MANIFOLDS, CHRISTMAS TREE ASSEMBLIES;FIRST USE AT LEAST AS EARLY AS AROUND MARCH 1959; IN COMMERCE AT LEAST AS EARLY AS AROUND MARCH 1959; AT LEAS T AS EARLY AS AROUND 1925, AS TO B.;FIRST USE AT LEAST AS EARLY AS AROUND MARCH 1959; IN COMMERCE AT LEAST AS EARLY AS AROUND MARCH 1959; AT LEAS T AS EARLY AS AROUND 1925, AS TO B.;
 

Where the owner name is not linked, that owner no longer owns the brand

    
Technical Examples
  1. A layered piezoelectric element includes a plurality of driving parts divided by grooves and non-driving parts formed at both ends of the array of the driving parts. The driving parts and the non-driving parts include the alternate layers of piezoelectric layers and internal electrodes. The common electrode of the driving parts is extended from the non-driving parts. The capacitance C (F) of each driving part, the number of the driving parts n, and the resistance R (?) between the non-driving parts satisfy R?8×10