Erich Quadflieg

This inventor holds 6 USPTO granted patents. Top assignees: Mannesmann Aktiengesellschaft, Mannesmann Aktiengellschaft, Vallourec Mannesmann Oil & Gas Germany Gmbh. Active years: 1990-2003.

USPTO Granted Patents = 6

% Patents Active = 100.0

Average Co-Inventor Count = 3.6

ph-index = 5

Forward Citations = 189(Granted Patents)

Company Filing History:

4 out of 1,150

Mannesmann Aktiengesellschaft

patents

1 out of 1

Mannesmann Aktiengellschaft

patent

1 out of 1

Vallourec Mannesmann Oil & Gas Germany Gmbh

patent

Years Active: 1990-2003

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6 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 6585299 - Pipe connector (2003-07-01),

2. 6513840 - Drill rod coupling (2003-02-04),

3. 6511102 - Pipe connector (2003-01-28),

4. 6155613 - Pipe joint (2000-12-05),

5. 5048871 - Screwed pipe joint (1991-09-17),

6. 4955644 - Drill pipe coupling (1990-09-11),

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