Steven Jerome Lewis

7716297, May 11, 2010

Jan 30, 2007

11/700473

Greg Wittel - St. Louis MO, US
Yanyan Yang - Sunnyvale CA, US
Scott Panzer - Sunnyvale CA, US
Steven Lewis - San Jose CA, US

Proofpoint, Inc. - Sunnyvale CA

G06F 15/16

709206, 709223, 726 22, 726 26

A system and method are described for performing a correlative statistical analysis on a stream of email messages to identify new spam campaigns. For example, a method according to one embodiment of the invention comprises: extracting a series of patterns from a stream of incoming email messages; performing a correlation between the patterns to identify recurring patterns within the stream of email messages over a specified time period; dynamically updating a spam filtering engine to include a particular recurring pattern if the number of times the particular recurring pattern is detected within the specified time period is above a first specified threshold value.

8356076, Jan 15, 2013

Jan 30, 2007

11/700467

Greg Wittel - St. Louis MO, US
Yanyan Yang - Sunnyvale CA, US
Scott Panzer - Sunnyvale CA, US
Steven Lewis - San Jose CA, US

Proofpoint, Inc. - Sunnyvale CA

G06F 15/16

709206, 709223, 382190, 726 4

A system and method are described for using different types of image fingerprints to detect spam. Specifically, one embodiment of the invention dynamically calculates both an image-specific signature (e. g. , MD5 checksum) and a generic signature for each image and, if a specified number of images have the same generic signature but different image-specific signatures, then a feature is fired within a spam engine to indicate that the images are spam. By way of example, a computer-implemented method is described for detecting spam images within a stream of messages comprising: generating generic signatures and image-specific signatures for images within the stream of messages; determining if two or more images with matching generic signatures have different image-specific signatures; and updating a spam filtering engine to include the matching generic signatures if the number of images with matching generic signatures but different image-specific signatures reach a specified threshold value.

42894514, Sep 15, 1981

Mar 30, 1979

6/025458

Steven M. Lewis - Santa Clara CA

National Semiconductor Corporation - Santa Clara CA

F04B 4904

417 40

A multi level indicator and control system for controlling upper and lower liquid level limits in a tank includes a first transparent column connected in selective communication with the liquid in the tank and extending between one of the limits of desired control and a second transparent column disposed below the other limit of desired control. A plurality of reed switches are disposed at different levels within the columns and each is magnetically responsive to a float confined to movement within a narrow range of movement adjacent the switch, for controlling the switches in response to the respective level of liquid in the tank. Valves are provided for selectively cutting off communication of the column with the tank so that the column may be drained and the switches checked or replaced when needed. Extended vent tubes may be provided for venting the column when the column is connected to a tank of a height many times that of the column.

20190179476, Jun 13, 2019

Dec 6, 2018

16/212321

- Oslo, NO
Tom KAVLI - Nittedal, NO
Steven LEWIS - Cupertino CA, US

G06F 3/041
G06F 3/043
G06F 3/042

A system for detecting a user input to a device comprises a display arrangement () arranged to provide a display () on a surface. An optical proximity sensing arrangement () is configured to produce touch information relating to whether an input object is within a threshold distance of the surface. An acoustic position sensing arrangement (, and ) configured to produce position information relating to a position of the input object on the surface. A processing arrangement configured to determine an input to the device from the position information only when it determines from the touch information that the input object is within the threshold distance of the surface.