Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Drilling tool speed shifting unit

Drilling tool speed shifting unit

US Patent 5111889 · Granted May 12, 1992

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Electrically powered hand-held screw driver2006
Hand-held power tool2002
Screw setting tool2000
Screw driving tool1998
Screw-driving tool1998
Drilling and/or chipping tool1997
Manually operated chipping tool1996
Hand-held tool with switching means for variable operation1990
Variably operable hand-held device1989
Hand-held device with tool sensing means1989
Drilling device1989
Lockable striking mechanism for hammer drill1989