Inventor
David B. Bartholomew
Inventor
Springville, UT, US
Overview
Patents· 25 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E21Bprimary
E21BEarth or rock drilling22%
H04BTransmission20%
G01VGeophysics12%
H04MTelephonic communication8%
H04LTransmission of digital information, e.g. telegraphic communication6%
H03KPulse technique4%
H04JMultiplex communication4%
F16LPipes2%
G06FElectric digital data processing2%
G06KGraphical data reading2%
PatentTitleYear
9,785,806'Low-frequency receiving for radio frequency identification'20177,948,395'Downhole transmission system comprising a coaxial capacitor'20117,810,125'Method and system for a low cost wireless telephone link for a set top box'20107,649,473'Physically segmented logical token network'20107,586,934'Apparatus for fixing latency'20097,570,175'Node discovery in physically segmented logical token network'20097,548,068'System for testing properties of a network'20097,288,857'Self-latching power supply apparatus'20077,277,026'Downhole component with multiple transmission elements'20077,275,597'Remote power management method and system in a downhole network'20077,274,304'System for loading executable code into volatile memory in a downhole tool'20077,253,671'Apparatus and method for compensating for clock drift in downhole drilling components'20077,207,396'Method and apparatus of assessing down-hole drilling conditions'20077,193,527'Swivel assembly'20077,142,129'Method and system for downhole clock synchronization'20067,135,933'System for adjusting frequency of electrical output pulses derived from an oscillator'20067,132,904'Apparatus for reducing noise'20067,123,160'Method for triggering an action'20066,567,474'Digital wireless phone/modem jack capable of communications over the power lines using differential binary phase shift keying (DBPSK)'20036,456,192'Method and system for power line null detection and automatic frequency and gain control'20026,107,912'Wireless modem jack'20005,911,119'Secure cordless telephone extension system and method'19995,852,785'Secure access telephone extension system and method in a cordless telephone system'19985,530,737'Secure access telephone extension system and method'19965,319,634'Multiple access telephone extension systems and methods'1994Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1994–2003Patents assigned to PHONEX CORP (5)· patent assignee history
1994–2010Based in West Valley City, UT, US· patent location history
2002–2010Patents assigned to PHONEX BROADBAND CORP (2)· patent assignee history
2006–2010Patents assigned to INTELLISERV INC (11)· patent assignee history
2006–2017Based in Springville, UT, US· patent location history
2007Patents assigned to BARTHOLOMEW DAVID (1)· patent assignee history
2007Based in Provo, UT, US· patent location history
2009Patents assigned to INTELLISERV INTERNAT HOLDING L (3)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| INTELLISERV INC | 11 | 2006–2010 |
| PHONEX CORP | 5 | 1994–2003 |
| INTELLISERV INTERNAT HOLDING L | 3 | 2009 |
| PHONEX BROADBAND CORP | 2 | 2002–2010 |
| BARTHOLOMEW DAVIDself | 1 | 2007 |
Locations
| Location | Patents | Span |
|---|---|---|
| Springville, UT, US | 16 | 2006–2017 |
| West Valley City, UT, US | 8 | 1994–2010 |
| Provo, UT, US | 1 | 2007 |