All Patents in class 408/194 |
Patents 16 -
30
of 32
|
Number | Date | Patentee | Title | Type |
476,614 | Jun. 07, 1892 | H.O. Davis | Adjustable Bit | adjustable drill bits |
509,667 | Nov. 28, 1893 | J.P. Lavigne | Expansible Bit | adjustable drill bits |
525,386 | Sep. 04, 1894 | E. Ford | Expansible bit | adjustable drill bits |
624,439 | May 09, 1899 | A.L. Adams | Expansion-Bit | adjustable drill bits |
661,554 | Nov. 13, 1900 | J.E. Roberts | Rotary Cutter Head | drill bits |
662,199 | Nov. 20, 1900 | J.P. Lavigne | Expansible Bit | adjustable drill bits |
722,481 | Mar. 10, 1903 | J.C. Beyer | Extension Boring-Bit | adjustable drill bits |
803,223 | Oct. 31, 1905 | T.F. Gaynor | Expansion-Auger | adjustable drill bits |
818,062 | Apr. 17, 1906 | S.H. Tucker | Expansible bit | adjustable drill bits |
825,479 | Jul. 10, 1906 | J.T. Parker | Adjustable Bit Attachment | drill accessories |
848,632 | Apr. 02, 1907 | G.T. Chafin | Bit | adjustable drill bits |
884,111 | Apr. 07, 1908 | O. Tack | Boring-Tool | adjustable drill bits |
931,593 | Aug. 17, 1909 | L.W. Garner | Expansible Boring-Bit | adjustable drill bits |
963,468 | Jul. 05, 1910 | E. Pastore | Expansible Bit | adjustable drill bits |
970,789 | Sep. 20, 1910 | G.P. Butler | Expansible Bit | adjustable drill bits |