Dear MrKnickers

      I have been pondering your question and to the best of my knowledge the item you are looking for is a rhomboidial olive pit picker. You should find one available at your local antique sundries store. Warn your dad to be careful while using it because while piercing the olive to the pith it can prick your palm , probably painfully.  If you have any other questions, please feel free to ask me. 

      In answer to your other question, yes I am a cat and simply Ubergato or Ubie is fine. Cats are rarely Misters. :>)

     Ubergato (Overcatus Pickus)