Stephen E. Long

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Baltimore, MD, US

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Patents Grantslast 30 patents

Information Patent Grant
Device for detecting gases for use in diffusion and forced flow modes
- Patent number 5,495,747
- Issue date Mar 5, 1996
- Mine Safety Appliances Company
- Roberta A. Herman
- G01 - MEASURING TESTING
Information Patent Grant
Gas analyzer with diffusion filter
- Patent number 5,054,328
- Issue date Oct 8, 1991
- Mine Safety Appliances Company
- Stephen E. Long
- G01 - MEASURING TESTING
Information Patent Grant
Solvator plug
- Patent number 4,198,281
- Issue date Apr 15, 1980
- Catalyst Research Corporation
- David N. Kramer
- G01 - MEASURING TESTING