Inventor · disambiguated record

Erwin Anton Letzgus, Jr.

Also filed as: LETZGUS ERWIN A · LETZGUS JR ERWIN ANTON

2 granted patents·44 citations·filing 1974–2003

61Inventor score

Technology areasB01F C04B

Files withQUIGLEY CO1 SPECIALTY MINERALS MICHIGAN1

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2 records

0179US3950504AProcess for producing magnesium aluminate spinelQUIGLEY CO·Filed 1974·Granted Apr 13, 1976·41 cites·5 claims
0244US6915966B2Apparatus for the gunning of a refractory material and nozzles for sameSPECIALTY MINERALS MICHIGAN·Filed 2003·Granted Jul 12, 2005·3 cites·15 claims

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Erwin Anton Letzgus, Jr. — Patent Inventor | PatentIndex