Nareshchandra J. Kar

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Westminster, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Process for laser hardening drilling bit cones having hard cutter i...
- Patent number 4,708,752
- Issue date Nov 24, 1987
- Smith International, Inc.
- Nareshchandra J. Kar
- C21 - METALLURGY OF IRON
Information Patent Grant
Cast steel rock bit cutter cones having metallurgically bonded cutt...
- Patent number 4,683,781
- Issue date Aug 4, 1987
- Smith International, Inc.
- Nareshchandra J. Kar
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Hermetically welded belleville seal for rock bits
- Patent number 4,632,401
- Issue date Dec 30, 1986
- Smith International, Inc.
- Nareshchandra J. Kar
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Hermetically welded belleville seal for rocks bits
- Patent number 4,560,175
- Issue date Dec 24, 1985
- Smith International, Inc.
- Nareshchandra J. Kar
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Dual squeeze seal gland
- Patent number 4,429,854
- Issue date Feb 7, 1984
- Smith International, Inc.
- Nareshchandra J. Kar
- E21 - EARTH DRILLING MINING