1.This specification covers portable masts@ which shall be defined as any mast structure suitable for oil-well or gas-well drilling or servicing. The guyed portable mast is erected to its working position as a unit@ is not normally dismantled into components for moving@ and is provided with guylines as essential load-carrying members. The free-standing portable mast is erected to its working position as a unit@ is normally dismantled into relatively large components for moving@ and does not require guylines as essential load-carrying members. 2. Nothing contained in this specification is to be construed as granting any right@ by implication or otherwise@ for manufacture@ sale@ or use in connection with any method@ apparatus@ or product covered by letters patent@ nor as insuring anyone against liability for infringement of letters patent.