DS

Daniel D. Friel, Sr.

DU Duracell: 5 patents #1 of 44Top 3%
ED Edgecraft: 2 patents #1 of 2Top 50%
📍 Wilmington, DE: #1 of 284 inventorsTop 1%
🗺 Delaware: #3 of 552 inventorsTop 1%
Overall (1997): #1,865 of 185,788Top 2%
7
Patents 1997

Issued Patents 1997

Showing 1–7 of 7 patents

Patent #TitleCo-InventorsDate
D388304 Versatile manual sharpener 1997-12-30
5691621 Battery pack having a processor controlled battery operating system Duong Var Phuoc, Rudi Wieczorek, Elmar Zeising, Louis W. Hruska, Alwyn H. Taylor +1 more 1997-11-25
5652502 Battery pack having a processor controlled battery operating system Duong van Phuoc, Rudi Wieczorek, Elmar Zeising, Louis W. Hruska, Alwyn H. Taylor +1 more 1997-07-29
5646508 Battery pack having a processor controlled battery operating system Duong van Phuoc, Rudi Wieczorek, Elmar Zeising, Louis W. Hruska, Alwyn H. Taylor +1 more 1997-07-08
5633573 Battery pack having a processor controlled battery operating system Duong van Phuoc, Rudi Wieczorek, Elmar Zeising, Louis W. Hruska, Matthew P. Hull +1 more 1997-05-27
5611726 High speed precision sharpening apparatus Robert P. Bigliano 1997-03-18
5606242 Smart battery algorithm for reporting battery parameters to an external device Matthew P. Hull, Alwyn H. Taylor, Louis W. Hruska 1997-02-25