The bat was first known as the Falls City Slugger. The name was changed to Louisville Slugger, and was registered as a trademark in 1894. In 1897 the name of the bat company was changed to J.F. Hillerich and Son. The Hillerich & Bradsby Company has used different oval center brands in their history, as well as different Trademarks. The Bats made from 1997 - 1911 read J.F. HILLERERICH & SON in the center label with TRADEMARK below the label. From the years 1911 - 1916 "Co" is added and the bat reads J.F. HILLERERICH & SON Co. in the center brand, and TRADE MARK REG US PAT OFF, below the label. From 1916 - 1929 they drop the word SON and go with HILLERERICH & BRADSBY Co. The bottom of the oval still reads TRADE MARK REG US PAT OFF. From 1930 - 1947 - TRADE MARK REG, and from 1948 - 1963 - REG US PAT OFF Starting in 1964 The Trademark is removed from the bottom of the center label, and the Registered trademark "R" is placed after the words Louisville Slugger. In 1973 Registered trademark "R" is also added above the "d" in Powerized. See Related Links below for more information on dating your bat, along with pictures of trademarks, and other bat stampings, visit the Louisville Slugger Bat Dating guide.
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Hillerich & Bradsby Co. has used different oval center brands in their history. During the 1930 - 1947 bat labeling period the center barand (Inside the oval) read as follows: Top: LOUISVILLE SLUGGER
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Center: HILLERERICH & BRADSBY Co
MADE IN USA
Bottom : LOUISVILLE K.Y.
Out side oval bottom: TRADE MARK REG If your bat is from 1934 it should read "Powerized and Oil Tempered" as it was only used in 1933, and 1934, which usually is a very light heat foil type print. In 1935 until present, they go with just "Powerized" The Powerized" process is to harden the surface of the bat much like the bone rubbed finish of the 1920's "Powerized and Bone Rubbed" logo is used during the 1932 season. The "Powerized" process was first used, and patented by the Hillerich & Bradsby Co. in 1931 and has pat. pending beneath the stamp. For more help with dating your Louisville Slugger Baseball bat, and other markings used throughout the years see Related Links below.