For the Inventor, By the Inventor

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Exton, PA, United States of America

A. Johnson Metals Corporation

USPTO Granted Patents = 3

Forward Citations = 28

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4 inventors (with patents filed for the assignee):

Howard R Harker (2 out of 12 patents)

Charles H Entrekin (1 out of 3 patents)

Joseph A Knecht, Ii (1 out of 1 patent)

4. Robert A Borowski (1 out of 1 patent)

3 patents: Sort by Forward Citations

1. 4763854 - Container for continuous supply of wire (1988-08-16),

2. 4750542 - Electron beam cold hearth refining (1988-06-14),

3. 4616363 - Electron-beam furnace with magnetic stabilization (1986-10-07),

Company Badge

USPTO Data Jan 1 1976 - Dec 16 2025

3 Patents

#50 in Exton, PA

#2,630 in Pennsylvania

#71,949 in US

Exton, PA, United States of America

A. Johnson Metals Corporation

Forward Citations = 28

4 inventors:

Howard R Harker (2 out of 12 patents)

Charles H Entrekin (1 out of 3 patents)

Joseph A Knecht, Ii (1 out of 1 patent)

4. Robert A Borowski (1 out of 1 patent)

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