Inventor

David Grabelsky

Inventor

Skokie, IL, US

Overview

1999–2013

Patent span

Electricity

Primary field (CPC H)

Patents· 39 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

H04Lprimary

H04LTransmission of digital information, e.g. telegraphic communication67%

H04MTelephonic communication19%

H04QSelecting8%

G06FElectric digital data processing2%

H04WWireless communication networks2%

Y04SSystems integrating technologies related to power network operation, communication or information technologies for improving the electrical power generation, transmission, distribution, management or usage, i.e. smart grids2%

PatentTitleYear

8,547,967'Method and apparatus for PSTN-based IP active call recovery and re-routing'2013 8,539,552'System and method for network based policy enforcement of intelligent-client features'2013 8,509,225'IP-based enhanced emergency services using intelligent client devices'2013 8,027,333'IP-based enhanced emergency services using intelligent client devices'2011 7,990,955'Method and apparatus for PSTN-based IP active call recovery and re-routing'2011 7,860,089'Method and system for network based call-pickup'2010 7,702,726'System and methods for providing presence services in IP network'2010 7,634,577'Media gateway proxy'2009 7,613,170'Method and apparatus for PSTN-based IP active call recovery and re-routing'2009 7,564,835'System and method for maximizing the use of bandwidth optimization techniques in voice-over-packet connections'2009 7,480,723'Method and system for providing directory based services'2009 7,453,815'Method and system for monitoring and management of the performance of real-time networks'2008 7,450,560'Method for address mapping in a network access system and a network access device for use therewith'2008 7,440,442'IP-based enhanced emergency services using intelligent client devices'2008 7,417,988'Method and system for network based call-pickup'2008 7,032,242'Method and system for distributed network address translation with network security features'2006 6,996,621'Method for supporting secondary address delivery on remote access servers'2006 6,966,003'System and method for switching security associations'2005 6,954,454'Architecture for a central office using IP technology'2005 6,948,074'Method and system for distributed generation of unique random numbers for digital tokens'2005 6,937,610'Method and protocol for a medium access control layer for local area networks with multiple-priority traffic'2005 6,822,957'Distributed network address translation for a network telephony system'2004 6,785,374'Method and apparatus for providing transaction capabilities application part information in a session initiation protocol system'2004 6,781,982'Method and system for allocating persistent private network addresses between private networks'2004 6,768,743'Method and system for address server redirection for multiple address networks'2004 6,766,377'Media gateway proxy'2004 6,711,159'Load balancing among media gateways'2004 6,708,219'Method and system for dual-network address utilization'2004 6,697,354'Method and system for distributed network address translation for mobile network devices'2004 6,678,250'Method and system for monitoring and management of the performance of real-time networks'2004 6,650,619'Method and system for facilitating increased call traffic by reducing signaling load in an emergency mode'2003 6,625,119'Method and system for facilitating increased call traffic by switching to a low bandwidth encoder in a public emergency mode'2003 6,567,405'Method and protocol for distributed network address translation'2003 6,381,638'System and method for options based address reuse'2002 6,353,614'Method and protocol for distributed network address translation'2002 6,353,891'Control channel security for realm specific internet protocol'2002 6,169,744'Method and protocol for a medium access control layer for local area networks with multiple-priority traffic'2001 6,055,236'Method and system for locating network services with distributed network address translation'2000 6,006,271'Method and protocol for complete collision avoidance contention resolution in local area networks'1999

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1999–2010Patents assigned to 3COM CORP (30)· patent assignee history

1999–2013Based in Skokie, IL, US· patent location history

2010–2011Patents assigned to HEWLETT PACKARD CO (3)· patent assignee history

2013Patents assigned to HEWLETT PACKARD DEVELOPMENT CO (3)· patent assignee history

2013Patents assigned to HOMEIER MICHAEL (3)· patent assignee history

2013Patents assigned to GRABELSKY DAVID (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
3COM CORP	30	1999–2010
HEWLETT PACKARD CO	3	2010–2011
HEWLETT PACKARD DEVELOPMENT CO	3	2013
HOMEIER MICHAEL	3	2013
GRABELSKY DAVIDself	2	2013

Locations

Location	Patents	Span
Skokie, Illinois, US	39	1999–2013