|
US4197140A
|
|
Process for cleaning internal combustion engine cylinders
|
|
US1965011A
|
|
Gasoline recovery apparatus
|
|
US1965010A
|
|
Apparatus for liquefying gases
|
|
US1829424A
|
|
Apparatus for condensing hydrocarbon vapors and the like
|
|
US1580455A
|
|
Method of collecting and storing natural cold
|
|
US1576867A
|
|
Method of collecting, conserving, and storing natural cold
|
|
US1568027A
|
|
Method of and means for releasing and recovering fast casing from wells
|
|
US1379657A
|
|
Method of excluding extraneous fluids from wells
|
|
US1455010A
|
|
Method of drilling wells
|
|
US1379656A
|
|
Method for preventing caving in wells
|
|
US1413197A
|
|
Apparatus for excluding water from drilled wells for oil
|
|
US1307027A
|
|
Method of excluding water from drilled wells for oil.
|
|
US979106A
|
|
Underreamer.
|
|
US997718A
|
|
Underreamer.
|
|
US973994A
|
|
Casing-perforator.
|
|
US973993A
|
|
Under bit and reamer.
|
|
US830464A
|
|
Convertible bailer.
|
|
US726111A
|
|
Drilling apparatus.
|
|
US717469A
|
|
Underreamer.
|
|
CA268537A
|
|
Atmospheric cold collecting apparatus
|
