| 161 |
Rock drill rotation mechanism |
US36703864 |
1964-05-13 |
US3211021A |
1965-10-12 |
FISH WALTER D |
|
| 162 |
Rock drill rotation mechanism |
US12707861 |
1961-07-12 |
US3074381A |
1963-01-22 |
OSGOOD CHARLES F |
|
| 163 |
Reversible dual rotation mechanism for rock drills |
US5116360 |
1960-08-22 |
US3059618A |
1962-10-23 |
OSGOOD CHARLES F |
|
| 164 |
Dual rotation for rock drills |
US80436659 |
1959-04-06 |
US3044448A |
1962-07-17 |
CURTIS JOHN C; ANTERO PARSSINEN TOIMI |
|
| 165 |
Pawl and ratchet mechanisms, particularly for pneumatic percussion tools |
US78373658 |
1958-12-30 |
US3029672A |
1962-04-17 |
FREDRIK LOWENBORG JOHN GOSTA |
|
| 166 |
Thiophene derivatives |
US83732759 |
1959-09-01 |
US2995564A |
1961-08-08 |
MAX DUENNENBERGER; EMIL SIEGRIST ADOLF; ERWIN MAEDER |
|
| 167 |
Anti-friction rotation mechanism for rock drills |
US73462058 |
1958-05-12 |
US2987045A |
1961-06-06 |
LEAR EARL B; DELOSS WILLIAMS |
|
| 168 |
Drilling device |
US78452259 |
1959-01-02 |
US2936637A |
1960-05-17 |
THOMPSON CHARLES T |
|
| 169 |
Rotation mechanism for rock drills |
US48907055 |
1955-02-18 |
US2755069A |
1956-07-17 |
MOSBY ARNOLD M |
|
| 170 |
Intermittent rotation mechanism with overload release |
US47701254 |
1954-12-22 |
US2737818A |
1956-03-13 |
FEUCHT JACOB E |
|
| 171 |
Pneumatic rock drill with selective drill steel rotation |
US37920753 |
1953-09-09 |
US2726640A |
1955-12-13 |
FUEHRER GEORGE H |
|
| 172 |
Motion converting means |
US9284249 |
1949-05-12 |
US2632331A |
1953-03-24 |
GIOSUE PINAZZA |
|
| 173 |
Rock drill rotation mechanism |
US32323140 |
1940-03-09 |
US2248824A |
1941-07-08 |
RICHARDSON LED L |
|
| 174 |
Rotation mechanism for rock drills |
US21665938 |
1938-06-30 |
US2221117A |
1940-11-12 |
SMITH JR WILLIAM A |
|
| 175 |
Rotation mechanism for rock drills |
US29058539 |
1939-08-17 |
US2208098A |
1940-07-16 |
HUFFMAN MERVIN C |
|
| 176 |
Rotation release for rock drills |
US22209438 |
1938-07-30 |
US2179643A |
1939-11-14 |
MATTHEW O'FARRELL |
|
| 177 |
Rotation mechanism |
US6883036 |
1936-03-14 |
US2109979A |
1938-03-01 |
SMITH SR WILLIAM A |
|
| 178 |
Rotation mechanism |
US13291137 |
1937-03-22 |
US2108989A |
1938-02-22 |
MACK ALBERT R |
|
| 179 |
Rock drill rotation means |
US72257134 |
1934-04-26 |
US2100324A |
1937-11-30 |
GARTIN ELMER G |
|
| 180 |
Drill steel rotation mechanism |
US9030736 |
1936-07-13 |
US2081924A |
1937-06-01 |
GARTIN ELMER G |
|
