Inventor · Burlington, ON, CA

Christopher L. Drenth

76Patents

11h-index

26Co-inventors

78Inventor score

Filing activity: Dec 24, 1996 → Dec 2, 2022

Most-cited inventions

Patent	Title	Area	Cited by	Status
US5788401A	Rod joint	Fixed Constructions	41	Expired
USD650052S1	Seal for head assembly	General	31	Expired
US7900716B2	Vibratory unit for drilling systems	Fixed Constructions	27	Active
USD622293S1	Spearhead	General	23	Expired
USD622294S1	Spearhead base	General	22	Expired
USD622741S1	Spearhead	General	22	Expired
USD624564S1	Spearhead base	General	22	Expired
US7967085B2	Braking devices for use in drilling operations	Fixed Constructions	20	Active
USD676877S1	Tube loader	General	19	Active
USD644673S1	Core lifter	General	18	Expired
USD648836S1	Seal for head assembly	General	16	Expired
USD649228S1	Seal for head assembly	General	10	Expired
USD647540S1	Core barrel sleeve with axial grooves	General	10	Expired
USD625346S1	Core lifter	General	10	Expired
US8485280B2	Core drilling tools with retractably lockable driven latch mechanisms	Fixed Constructions	9	Active
US8051925B2	Core barrel assemblies with braking devices	Fixed Constructions	9	Active
USD644668S1	Core barrel head assembly with axial groove	General	8	Expired
USD649167S1	Core barrel head assembly with tapered design	General	8	Expired
USD643859S1	Core barrel assembly with tapered design	General	7	Expired
US9810029B2	Drill string components resistant to jamming	Fixed Constructions	7	Active
USD643443S1	Core barrel latch body with axial grooves	General	6	Expired
US8794355B2	Driven latch mechanism	Emerging Cross-Sectional Technologies	6	Active
USD664567S1	Core barrel latch body	General	6	Active
US9546524B2	Handling and recovery devices for tubular members and associated methods	Fixed Constructions	5	Active
USD664566S1	Core barrel retracting case	General	5	Active

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.