A screwdriver is a tool, manual or powered, for turning (driving or removing)
screws. A typical ... screwdrivers were used in Europe in the late Middle Ages.
They were probably invented in the late ...
In 1908, square-drive screws were invented by Canadian P. L. Robertson. ... than
a slot head because the screwdriver will not slip out of the screw's head during ...
The second most widely used screwdriver, the "Phillips," was invented in the late
1920s by Henry Phillips. Soon after its introduction, the tool posed a dilemma ...
The first mention of a screwdriver or something resembling a screwdriver in
history is assumed ... Some people believe that the screwdriver was invented
Apr 26, 2016 ... The Screwdriver might be a sneaky, and extremely simple, mixed drink. ... Not to
imply the drink was invented in the States, but by the late ...
Mar 24, 2015 ... One out of three cocktails ordered in the US contain vodka, a spirit that pours in
$20 billion annually in sales, according to Victorino Matus, ...
The history of the Roberston screwdriver, invented by P.L. Robertson, is detailed
Who is the Phillips head screwdriver named after? ... Henry F. Phillips, of
Portland, OR, invented the X-shaped socket head screw for car makers who
needed a ...
Jun 12, 2013 ... He discovers that all of these tools were invented during the Roman age if ... To
remove a screw without a screwdriver, one actually has to cut ...