Ratchet-type holder for a vertical blind vane

Ratchet/release mechanism for a retrievable well apparatus...

Ratcheting latch mechanism for a vertical rod door exit device

Ratcheting pawl latch

Rate controllable gel for conformance improvement treatment...

Rate gyro wells survey system including nulling system

Rate induced diversion for multi-stage stimulation

Rate of penetration sensor for oil drilling rigs

Rate-controlled polymer gelation process for oil recovery...

Rationing cigarette dispenser

Raw sewage disposal apparatus and prefab for accomodating...

Ray brick

Rcc dam construction and method

Rcd hydraulic stripping adapter

Re-configurable armored tactical personnel and collective...

Re-enterable duct seal

Re-enterable gravel pack system with inflate packer

Re-keyable cylinder lock

Re-keyable lock and method

Re-keyable lock assembly