Rafter vent
Railroad tie
Recreational kit for constructing objects
Register assembly
Reinforced concrete pile and a method of manufacturing such a pi
Releasable coupling device for a power transmission shaft
Releasable locking mechanism
Retainer for slip sleeve liners
Retaining arrangement for a rod member
Retaining panel
Retaining walls
Roof vent and method of making same
Rotating shaft coupling for use in vacuum