Xin Hu, 436423 Dylan Springs Ln, Katy, TX 77450

8321942, Nov 27, 2012

Mar 12, 2009

12/403335

Kent E. Griffin - Santa Monica CA, US
Scott Schneider - Santa Monica CA, US
Xin Hu - Ann Arbor MI, US

Symantec Corporation - Mountain View CA

G06F 21/56

726 24, 726 22, 726 23

A candidate signature for a known malware entity is selected for analysis. A set of malware entities that contain the candidate signature is identified. A diversity measurement for the candidate signature is determined. The diversity measurement describes the diversity of the set of malware entities that contain the candidate signature. A determination is made whether to use the candidate signature to identify the known malware entity based at least in part on the diversity measurement. Responsive to the determination, the candidate malware signature is stored as a signature for the known malware entity.

8239948, Aug 7, 2012

Dec 19, 2008

12/340420

Kent E. Griffin - Santa Monica CA, US
Scott Schneider - Santa Monica CA, US
Xin Hu - Ann Arbor MI, US

Symantec Corporation - Mountain View CA

G06F 11/00

726 24, 726 22, 707200

A set of candidate signatures for a malicious software (malware) is generated. The candidate signatures in the set are scored based on features that indicate the signatures are more unique and thus less likely to generically occur non-malicious programs. A malware signature for the malware entity is selected from among the candidate malware signatures based on the scores. The selected malware signature is stored.

2015011, Apr 30, 2015

Sep 26, 2014

14/497413

- Houston TX, US
Tommy G. Ray - Houston TX, US
Jianbing Hu - Houston TX, US
Zhenbi Su - Spring TX, US
Dwayne P. Terracina - Spring TX, US
Xin Hu - The Woodlands TX, US

E21B 7/24
E21B 17/10
E21B 34/14

175 56, 1663321

Various implementations described herein are directed to a vibration tool, e.g., for use in drilling or other downhole operations. In one implementation, the vibration tool may include a housing having a bore extending therethrough. The vibration tool may also include a piston subassembly positioned inside the bore, where the piston subassembly is configured to oscillate when fluid flow inside the piston subassembly exceeds a predetermined flow rate. The vibration tool may further include a valve mechanism positioned around the piston subassembly, where the valve mechanism is configured to restrict fluid to flow inside the piston subassembly when the valve mechanism is in a closed state and configured to allow the fluid to flow from the piston subassembly to the bore when the valve mechanism is in an open state.