Steven L Alexander

US Patent:

20140058610, Feb 27, 2014

Filed:

Oct 30, 2013

Appl. No.:

14/067705

Inventors:

Vladimir ERMAKOV - Santa Clara CA, US
Mark EMMERICH - San Jose CA, US
Steven ALEXANDER - Fremont CA, US
Nathaniel David MONSON - Mountain View CA, US

Assignee:

NEATO ROBOTICS, INC. - Newark CA

International Classification:

B25J 9/00
B25J 9/16

US Classification:

701 23, 701461, 901 1

Abstract:

Techniques that optimize performance of simultaneous localization and mapping (SLAM) processes for mobile devices, typically a mobile robot. In one embodiment, erroneous particles are introduced to the particle filtering process of localization. Monitoring the weights of the erroneous particles relative to the particles maintained for SLAM provides a verification that the robot is localized and detection that it is no longer localized. In another embodiment, cell-based grid mapping of a mobile robot's environment also monitors cells for changes in their probability of occupancy. Cells with a changing occupancy probability are marked as dynamic and updating of such cells to the map is suspended or modified until their individual occupancy probabilities have stabilized. In another embodiment, mapping is suspended when it is determined that the device is acquiring data regarding its physical environment in such a way that use of the data for mapping will incorporate distortions into the map, as for example when the robotic device is tilted.

US Patent:

47612371, Aug 2, 1988

Filed:

Jun 22, 1987

Appl. No.:

7/065656

Inventors:

Steven R. Alexander - Tigard OR
W. Michael Myers - Tualatin OR

Assignee:

Baxter Travenol Laboratories, Inc. - Deerfield IL

International Classification:

B01D 1300

US Classification:

210647

Abstract:

A peritoneal dialysis solution which comprises a water solution of physiological pH, and having physiological salts and metabolizable carbohydrate polymers in concentrations sufficient to safely effect the removal of solutes and water from a patient by peritoneal dialysis.

US Patent:

43769063, Mar 15, 1983

Filed:

Apr 21, 1982

Appl. No.:

6/370592

Inventors:

Imre Szilagyi - Sunnyvale CA
Steven Alexander - San Jose CA

Assignee:

ILC Technology, Inc. - Sunnyvale CA

International Classification:

H01J 550

US Classification:

313332

Abstract:

An improved high intensity metal halide lamp constructed from a lamp envelope assembly to which are fused a pair of mating prebeaded electrode assemblies. The lamp envelope assembly is formed from an arc discharge envelope to which are attached a pair of side arms coaxial with the arc discharge envelope and on opposite sides thereof. The prebeaded electrode assemblies are constructed from an electrode ribbon assembly which is encapsulated by vitreous quartz which has a lower hydroxyl ion content than the quartz used in the side arms of the lamp envelope.

US Patent:

20170371341, Dec 28, 2017

Filed:

Mar 31, 2015

Appl. No.:

14/674858

Inventors:

- Newark CA, US
Chang Young KIM - Newark CA, US
Sarath Kumar SUVARNA - Fremont CA, US
Steven Mathew ALEXANDER - Fremont CA, US
Michael R. PERKINS - Los Gatos CA, US

Assignee:

NEATO ROBOTICS, INC. - Newark CA

International Classification:

G05D 1/02
A47L 11/40

Abstract:

A robotic cleaning device and method of control thereof. The device and method enable multiple cleaning passes within an environment efficiently, cleaning the entire environment more than once, or cleaning the entire environment and then focusing on one or more particularly dirty areas to provide enhanced cleaning by making one or more passes over a dirty area in a dominant and a non-dominant direction. The robotic cleaning device may identify such areas in the course of its cleaning, or it may record such areas previously as being historically dirty and requiring additional attention. The device may vacuum; it may shampoo; it may polish; or it may perform other cleaning operations. Where the device is battery-powered, the device may check its state of charge before performing the enhanced cleaning, and may repeat the enhanced cleaning if the battery or batteries have sufficient charge.

US Patent:

20170255203, Sep 7, 2017

Filed:

May 22, 2017

Appl. No.:

15/602012

Inventors:

- Newark CA, US
Vladimir ERMAKOV - Santa Clara CA, US
Mark EMMERICH - San Jose CA, US
Steven ALEXANDER - Fremont CA, US
Nathaniel David MONSON - Mountain View CA, US

Assignee:

NEATO ROBOTICS, INC, - Newark CA

International Classification:

G05D 1/02
B25J 11/00
B25J 9/16
B25J 9/00

Abstract:

Techniques that optimize performance of simultaneous localization and mapping (SLAM) processes for mobile devices, typically a mobile robot. In one embodiment, erroneous particles are introduced to the particle filtering process of localization. Monitoring the weights of the erroneous particles relative to the particles maintained for SLAM provides a verification that the robot is localized and detection that it is no longer localized. In another embodiment, cell-based grid mapping of a mobile robot's environment also monitors cells for changes in their probability of occupancy. Cells with a changing occupancy probability are marked as dynamic and updating of such cells to the map is suspended or modified until their individual occupancy probabilities have stabilized. In another embodiment, mapping is suspended when it is determined that the device is acquiring data regarding its physical environment in such a way that use of the data for mapping will incorporate distortions into the map, as for example when the robotic device is tilted.

US Patent:

20150370723, Dec 24, 2015

Filed:

Jun 18, 2015

Appl. No.:

14/743892

Inventors:

- Sunnyvale CA, US
Prasad Palkar - Sunnyvale CA, US
Ramsundar Janakiraman - Fremont CA, US
Shankar Subramaniam - Cupertino CA, US
Giri Gopalan - Saratoga CA, US
Mohan Parthasarathy - Cupertino CA, US
Steven Alexander - Woodside CA, US

International Classification:

G06F 12/12
G06F 12/14

Abstract:

A network sensor that features a data store and a packet processing engine. Communicatively coupled to the data store, the packet processing engine is configured to (i) generate a retention priority for at least a first flow within a first storage region of a plurality of storage regions and (ii) identify, in response to an eviction request, the priority of each of the plurality of storage regions. The priority of the first storage region is partially based on the retention priority associated with the first flow while the priority of a second storage region is based on retention priorities associated with flows stored within the second storage region. The packet processing engine also is configured to identify, through use of the retention priorities of the stored flows within the first storage region, which flows are to be retained and which flows are to be evicted.

US Patent:

20150372910, Dec 24, 2015

Filed:

Jun 18, 2015

Appl. No.:

14/743902

Inventors:

- Sunnyvale CA, US
Prasad Palkar - Sunnyvale CA, US
Mohan Parthasarathy - Cupertino CA, US
Brijesh Nambiar - Santa Clara CA, US
Giri Gopalan - Saratoga CA, US
Shankar Subramaniam - Cupertino CA, US
Suhas Shetty - Saratoga CA, US
Steven Alexander - Woodside CA, US

International Classification:

H04L 12/741
H04L 12/743
H04L 12/747

Abstract:

A network sensor that features a data store and a packet processing engine. In communication with the data store, the packet processing engine comprises (1) a cache management logic and (2) deduplication logic. The cache management logic is configured to analyze packets to determine whether (a) a packet under analysis include duplicated data and (b) content of the packet is targeted for storage in a same continuous logical storage area as the duplicated data. The deduplication logic, when activated by the cache management logic, is configured to generate a deduplication reference for insertion into the packet prior to storage.

US Patent:

20150105964, Apr 16, 2015

Filed:

Nov 17, 2014

Appl. No.:

14/543508

Inventors:

- Newark CA, US
Vladimir ERMAKOV - Santa Clara CA, US
Mark EMMERICH - San Jose CA, US
Steven ALEXANDER - Fremont CA, US
Nathaniel David MONSON - Mountain View CA, US

Assignee:

NEATO ROBOTICS, INC. - Newark CA

International Classification:

G05D 1/02
B25J 9/00
B25J 11/00
B25J 9/16

US Classification:

701 23, 701461, 901 47, 901 1

Abstract:

Techniques that optimize performance of simultaneous localization and mapping (SLAM) processes for mobile devices, typically a mobile robot. In one embodiment, erroneous particles are introduced to the particle filtering process of localization. Monitoring the weights of the erroneous particles relative to the particles maintained for SLAM provides a verification that the robot is localized and detection that it is no longer localized. In another embodiment, cell-based grid mapping of a mobile robot's environment also monitors cells for changes in their probability of occupancy. Cells with a changing occupancy probability are marked as dynamic and updating of such cells to the map is suspended or modified until their individual occupancy probabilities have stabilized. In another embodiment, mapping is suspended when it is determined that the device is acquiring data regarding its physical environment in such a way that use of the data for mapping will incorporate distortions into the map, as for example when the robotic device is tilted.