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Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Nancy K. Schmidt — 17 Patents

ATAT&T: 13 patents #1,339 of 18,772Top 8%
AVAvaya: 5 patents #299 of 1,730Top 20%
Broomfield, CO: #77 of 1,198 inventorsTop 7%
Colorado: #2,451 of 40,980 inventorsTop 6%
Overall (All Time): #263,971 of 4,157,543Top 7%
17 Patents All Time
Nancy K. Schmidt has been granted 17 US patents while listed as an inventor at AT&T. The first was granted in 1987 and the most recent in September 2016. Nancy K. Schmidt ranks #263,971 of 4,157,543 US inventors in our database (top 6.3%). Patent records list Nancy K. Schmidt in Broomfield, CO, US.

Patents per Year

Patents granted per year, 1987 to 2016Bar chart with a peak of 8 patents in 1994.peak 81987: 1 patents19871994: 8 patents19941995: 2 patents19951996: 1 patents19962008: 1 patents20082010: 1 patents20102012: 1 patents20122015: 1 patents20152016: 1 patents2016

Issued Patents All Time

Showing 1–17 of 17 patents

Patent #TitleCo-InventorsDate
9438636 Method to block split phone and gateway registration Charles Y. Farwell, Don Gillespie, Cliff Grimes, Scott Hendrick, Won Huh +5 more 2016-09-06
9183359 Method and apparatus for assigning and releasing licenses William T. Walker 2015-11-10
8089872 Efficient load balancing and heartbeat mechanism for telecommunication endpoints Mehmet C. Balasaygun, Frank J. Boyle, Scott Hendrick, Renee Krahn, Manish Marwah +1 more 2012-01-03
7668100 Efficient load balancing and heartbeat mechanism for telecommunication endpoints Mehmet C. Balasaygun, Frank J. Boyle, Scott Hendrick, Renee Krahn, Manish Marwah +1 more 2010-02-23
7327721 Determination of endpoint virtual address assignment in an internet telephony system Mehmet C. Balasaygun, Charles Bertsch, Anthony Frissora, Robert R. Gilman, Brijesh Mandan 2008-02-05
5485512 Mnemonic and synonymic addressing in a telecommunications system Frank J. Bogart, Bruce D. Butterfield, David Chavez, Henry C. Dittmer, Frederick R. Fix +2 more 1996-01-16
5412714 Mnemonic and synonymic addressing in a telecommunications system Frank J. Bogart, Bruce D. Butterfield, David Chavez, Henry C. Dittmer, Frederick R. Fix +2 more 1995-05-02
5404395 External-to-internal numbering plan aliasing Frank J. Bogart, Bruce D. Butterfield, David Chavez, Henry C. Dittmer, Frederick R. Fix +2 more 1995-04-04
5343517 Use-code based call-treatment selection Frank J. Bogart, Bruce D. Butterfield, David Chavez, Henry C. Dittmer, Frederick R. Fix +2 more 1994-08-30
5333188 Dialed number recognition arrangement Frank J. Bogart, Bruce D. Butterfield, David Chavez, Henry C. Dittmer, Frederick R. Fix +2 more 1994-07-26
5329582 Dynamic tone-administration Frank J. Bogart, Bruce D. Butterfield, David Chavez, Henry C. Dittmer, Frederick R. Fix +2 more 1994-07-12
5321743 Shared-tenant services arrangement providing numbering-plan independence and cross-plan access to tenant groups Frank J. Bogart, Bruce D. Butterfield, David Chavez, Henry C. Dittmer, Frederick R. Fix +2 more 1994-06-14
5311584 Telecommunications call-processing arrangement Frank J. Bogart, Bruce D. Butterfield, David Chavez, Henry C. Dittmer, Frederick R. Fix +2 more 1994-05-10
5311586 Dynamic routing-administration Frank J. Bogart, Bruce D. Butterfield, David Chavez, Henry C. Ditmer, Frederick R. Fix +2 more 1994-05-10
5299261 Arrangement for effecting segmentation of a dialed number Frank J. Bogart, Bruce D. Butterfield, David Chavez, Henry C. Dittmer, Frederick R. Fix +2 more 1994-03-29
5289535 Context-dependent call-feature selection Frank J. Bogart, Bruce D. Butterfield, David Chavez, Henry C. Dittmer, Frederick R. Fix +2 more 1994-02-22
4661974 Automatic route selection of a private telephone network path on the basis of a public telephone network number Bruce M. Bales, Steven London 1987-04-28