Assignee
ERNST ALFRED
7 granted patents·1 pending application·72 citations·filing 1976–2004
Top patents by PatentIndex Score
8 records- 0164US5309754AHardness tester and method for measuring the hardness of metallic materialsERNST ALFRED·Filed 1991·Granted May 10, 1994·28 cites·4 claims
- 0254US4023401AHand-operable durometerERNST ALFRED·Filed 1976·Granted May 17, 1977·13 cites·18 claims
- 0345US4107978ADurometer according to Rockwell systemERNST ALFRED·Filed 1977·Granted Aug 22, 1978·9 cites·12 claims
- 0443US4444045AHand-operated hardness meterERNST ALFRED·Filed 1982·Granted Apr 24, 1984·9 cites·10 claims
- 0543US4262525AHardness testing apparatus provided with a safety stop deviceERNST ALFRED·Filed 1979·Granted Apr 21, 1981·8 cites·3 claims
- 0643US2009107221A1Hardness tester with indenter of hard metal or compound and oscillating crown for testing at high load and method of comparative assesment of the hardness/depth profileERNST ALFRED·Filed 2004·Application pending·0 cites
- 0732US4899578ADriving device for a hardness measuring instrumentERNST ALFRED·Filed 1988·Granted Feb 13, 1990·4 cites·23 claims
- 0828US4182162ADurometerERNST ALFRED·Filed 1978·Granted Jan 8, 1980·1 cites·9 claims
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