Patent No. 2827697 does looks like it.
"Patented Mar. 25, 1958
2,827,697 SEAM REEFING TOOL Leonard F. Woodel, Hollis, N. Y. Application April 5,1956, Sena! No. 576,459 2 Claims. (CI. 30—293)
The present invention relates in general to seam reefing tools, and more particularly to hand tools for raking calked joints in decking and sides of boats and the like preparatory to recalking joints.
http://www.google.com/patents?id=zklQAAAAEBAJ&pg=PA1&dq=2,827,697&source=gbs_selected_pages&cad=2#v=onepage&q=2%2C827%2C697&f=false (http://www.google.com/patents?id=zklQAAAAEBAJ&pg=PA1&dq=2,827,697&source=gbs_selected_pages&cad=2#v=onepage&q=2%2C827%2C697&f=false)
(http://www.google.com/patents?id=zklQAAAAEBAJ&pg=PA1&img=1&zoom=4&hl=en&sig=ACfU3U0QfJkMfVwmelUhi2-2xPlSvQmRcg&ci=51%2C162%2C800%2C1176&edge=0)