Frederick J. Bartnicki has been granted 13 US patents while listed as an inventor at Werner . The first was granted in 1991 and the most recent in November 2000. Frederick J. Bartnicki ranks #362,438 of 4,157,543 US inventors in our database (top 8.7%). Patent records list Frederick J. Bartnicki in Greenville, PA, US.
Patents per Year Patents granted per year, 1991 to 2000 Bar chart with a peak of 3 patents in 1993. peak 3 1991: 1 patents 1991 1992: 1 patents 1992 1993: 3 patents 1993 1994: 2 patents 1994 1996: 1 patents 1996 1997: 1 patents 1997 1998: 1 patents 1998 1999: 1 patents 1999 2000: 2 patents 2000
Issued Patents All Time
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Showing 1–13 of 13 patents
Patent # Title Co-Inventors Date
6142255 Ladder, member for connecting a rail to a horizontal element of a ladder, and method David E. Plotner , Edward E. Heald , Richard P. Sulecki , Mitchell H. Hetrich 2000-11-07
D422717 Ladder top James Hand , Randall Bell , John J. Dylik , Edward E. Heald 2000-04-11
D413990 Front face of a ladder top James Hand , Randall Bell , John J. Dylik , Edward E. Heald 1999-09-14
5791439 Ladder, member for connecting a rail to a horizontal element of a ladder, and method, and apparatus and method for holding a washer David E. Plotner , Edward E. Heald , Kevin McIntire , Richard P. Sulecki , Mitchell H. Hetrich 1998-08-11
5636706 Ladder, member for connecting a rail to a horizontal element of a ladder, and method David E. Plotner , Edward E. Heald , Richard P. Sulecki , Mitchell H. Hetrich 1997-06-10
5573081 Ladder top with bail recess Lauren S. Sherbondy , Donald M. Werner , Robert D. Beggs , Dale R. King , Harold L. Bernard 1996-11-12
5366051 Hollow plastic ladder Robert D. Beggs 1994-11-22
5358070 Ladder top Harold L. Bernard , Robert D. Beggs , Donald M. Werner , Dale R. King 1994-10-25
5259480 Ladder top Harold L. Bernard , Robert D. Beggs , Donald M. Werner 1993-11-09
D340773 Ladder top Harold L. Bernard , Robert D. Beggs , Donald M. Werner 1993-10-26
D340291 Ladder pail shelf Robert D. Beggs , Francis W. MacGregor , Donald M. Werner 1993-10-12
5131495 Hollow plastic ladder Robert D. Beggs 1992-07-21
5067589 Extendable support — 1991-11-26