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USPTO Patent Rankings Data through Dec 31, 2025
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David W. Griffith — 19 Patents

IHIo-Mega Holding: 16 patents #12 of 308Top 4%
UWUniversity Of Wollongong: 1 patents #29 of 84Top 35%
Layton, UT: #16 of 318 inventorsTop 6%
Utah: #917 of 19,430 inventorsTop 5%
Overall (All Time): #229,345 of 4,157,543Top 6%
19 Patents All Time
David W. Griffith has been granted 19 US patents while listed as an inventor at Io-Mega Holding. The first was granted in 1987 and the most recent in October 2006. David W. Griffith ranks #229,345 of 4,157,543 US inventors in our database (top 5.5%). Patent records list David W. Griffith in Layton, UT, US.

Issued Patents All Time

Showing 1–19 of 19 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
7123446 Removable cartridge recording device incorporating antiferromagnetically coupled rigid magnetic media Fred Charles Thomas, III 2006-10-17 $1,777,000
6981222 End-to-end transaction processing and statusing system and method Gary W. Rush, Herman J. Kiefus, Christopher Marcus Clapp, Helen Follett 2005-12-27
6252740 Disk drive cartridge door Wayne A. Sumner, Allen T. Bracken, David E. Jones, Edward L. Rich 2001-06-26 $10,127,000
D430575 Information storage disk cartridge Wayne A. Sumner, Allen T. Bracken, Nicholas Brawne, T. Greg Nguyen 2000-09-05
6094327 Disk drive cartridge door Wayne A. Sumner, Allen T. Bracken, David E. Jones, Edward L. Rich 2000-07-25 $8,475,000
D422981 Information storage disk cartridge Wayne A. Sumner, Allen T. Bracken, Nicholas Brawne, T. Greg Nguyen 2000-04-18
D421748 Storage disk cartridge Wayne A. Sumner, Allen T. Bracken, Nicholas Brawne, T. Greg Nguyen 2000-03-21
D408801 Computer storage disk cartridge Wayne A. Sumner, Allen T. Bracken, Nicholas Brawne, John Marshall 1999-04-27
5887176 Method and system for remote monitoring and tracking of inventory Alan C. Hurkamp, Donald K. Salmon 1999-03-23
5856901 Disk drive cartridge door Wayne A. Sumner, Allen T. Bracken, David E. Jones, Edward L. Rich 1999-01-05 $46,196,000
5838008 Method and apparatus for measuring gas concentrations and isotope ratios in gases Michael Brian Esler 1998-11-17
5831795 Head loading mechanism for a disk drive Yiping Ma, Edward L. Rich, Fred Charles Thomas, III 1998-11-03 $20,151,000
5768074 Disk drive cartridge door Wayne A. Sumner, Allen T. Bracken, David E. Jones, Edward L. Rich 1998-06-16 $12,764,000
5768059 Head load/unload and cleaning in a data storage device Ross W. Bishop, Allen T. Bracken, John C. Briggs, David E. Jones, Carl F. Nicklos +2 more 1998-06-16 $12,764,000
5671109 Disk drive cartridge door Wayne A. Sumner, Allen T. Bracken, David E. Jones, Edward L. Rich 1997-09-23 $50,266,000
D378518 Computer storage disk cartridge Wayne A. Sumner, Allen T. Bracken, Nicholas Brawne 1997-03-18
5570252 Disk drive cartridge door Wayne A. Sumner, Allen T. Bracken, David E. Jones, Edward L. Rich 1996-10-29 $74,958,000
5216558 Drawer loading removable cartridge disk drive David E. Jones, Allen T. Bracken, Theon Rawlings 1993-06-01 $495,000
4663677 Magnetic disk drive having a movable drive motor loading mechanism Michael R. Lyon, Ross W. Bishop, Edward Friery 1987-05-05 $667,000