RJ

Robert H. Johns

AL Allegheny Ludlum: 7 patents #4 of 96Top 5%
AS Allegheny Ludlum Steel: 2 patents #15 of 55Top 30%
📍 Huntingdon Valley, PA: #15 of 195 inventorsTop 8%
🗺 Pennsylvania: #5,969 of 74,527 inventorsTop 9%
Overall (All Time): #391,300 of 4,157,543Top 10%
13
Patents All Time

Issued Patents All Time

Showing 1–13 of 13 patents

Patent #TitleCo-InventorsDate
4944495 Method and apparatus for leveling a refractory bed surface J. Richard Rzomp 1990-07-31
4897925 Apparatus for determining surface profiles of metallic workpieces 1990-02-06
4858327 Apparatus for determining an edge profile of a metallic workpiece 1989-08-22
4821285 Thermocouple selection switch 1989-04-11
4768409 Method and apparatus for servering thin strip 1988-09-06
4715428 Method and apparatus for direct casting of crystalline strip by radiant cooling John D. Nauman 1987-12-29
4678719 Method and apparatus for continuous casting of crystalline strip John D. Nauman 1987-07-07
4425565 Multiple resonant coil using distributed capacity between turns 1984-01-10
4413262 Multiple frequency tuned circuit 1983-11-01
4399860 Apparatus for strip casting 1983-08-23
4335386 Bifilar antenna trap 1982-06-15
4334228 Bifilar antenna trap 1982-06-08
4330025 Nozzle in a strip casting apparatus 1982-05-18