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David R. Machin
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Lafayette, IN, US
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last 30 patents
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Patent Grant
Performance evaluation through benchmarking using an on-line questi...
Patent number
6,877,034
Issue date
Apr 5, 2005
Benchmark Portal, Inc.
David R. Machin
G06 - COMPUTING CALCULATING COUNTING
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Patent Grant
System and method for determining the performance of a user respond...
Patent number
6,038,544
Issue date
Mar 14, 2000
Teknekron Infoswitch Corporation
David R. Machin
G06 - COMPUTING CALCULATING COUNTING