•  Expert technical & legal evaluation of any published patent or
    patent portfolio -- including the scope, technical significance, and
    liklihood of infringement.
  •  Broaden patent claims for new and recently issued patents.
  •  Creation or acquisition of new "blocking" patents to strengthen a
    company's patent portfolio.  Sourland has agreements in place
    with one of the best patent firms in Silicon Valley that has already
    produced 20 new RFID and display patents.
  •  Roger Stewart has successfully negotiated numerous national
    and international patent licensing agreements on behalf of
    several clients based on the negotiation training he received at
    MIT & Sarnoff.  Patent licensing services are provided on an
    hourly basis.
List of Stewart's Issued USA Patents

1.          3,947,727         Protection circuit for insulated-gate field-effect transistors
2.          3,967,295         Input transient protection for integrated circuit element
3.          3,999,205         Rectifier structure for a semiconductor integrated circuit device
4.          4,037,114         Tri-state logic circuit
5.          4,039,858         Transition detector
6.          4,044,341         Memory array
7.          4,045,688         Power-on reset circuit
8.          4,061,962         Current mirror amplifier augmentation of regulator transistor current flow
9.          4,063,225         Memory cell and array
10.        4,075,690         Write enhancement circuit
11.        4,080,539         Level shift circuit
12.        4,107,556         Sense circuit employing complementary field effect transistors
13.        4,185,319         Non-volatile memory device
14.        4,208,730         Precharge circuit for memory array
15.        4,216,390         Level shift circuit
16.        4,236,199         Regulated high voltage power supply
17.        4,239,994         Asymmetrically precharged sense amplifier
18.        4,281,400         Circuit for reducing the loading effect of an insulated-gate IGFET on a  signal source
19.        4,329,600         Overload protection circuit for output driver
20.        4,337,522         Memory circuit with means for compensating for inversion of stored data
21.        4,339,809         Noise protection circuits
22.        4,344,005         Power gated decoding
23.        4,354,255         Random access memory with volatile and non-volatile storage
24.        4,386,284         Pulse generating circuit using current source
25.        4,398,102         Gated parallel decoder
26.        4,405,996         Precharge with power conservation
27.        4,419,741         Read only memory (ROM) having high density memory array with on pitch decoder circuitry
28.        4,423,432         Apparatus for decoding multiple input lines
29.        4,434,381         Sense amplifiers
30.        4,442,447         Electrically alterable nonvolatile floating gate memory device
31.        4,450,562         Two level parity error correction system
32.        4,464,754         Memory system with redundancy for error avoidance
33.        4,464,755         Memory system with error detection and correction
34.        4,472,805         Memory system with error storage
35.        4,513,397         Electrically alterable, nonvolatile floating gate memory device
36.        4,527,081         Overshoot pre-driven semi-asynchronous driver
37.        4,558,240         Multi mode amplifier
38.        4,577,215         Dual word line, electrically alterable, nonvolatile floating gate memory device
39.        4,589,008         Apparatus for electrically joining the ends of substantially parallel semiconductor lines
40.        4,608,591         Electrically alterable programmable nonvolatile floating gate memory device
41.        4,612,466         High-speed output driver
42.        4,618,876         Electrically alterable, nonvolatile floating gate memory device
43.        4,738,514         Crystal variation compensation circuit for liquid crystal displays
44.        4,742,346         System for applying grey scale codes to the pixels of a display device
45.        4,760,557         Radiation hard memory cell circuit with high inverter impedance ratio
46.        4,766,430         Display device drive circuit
47.        4,828,365         Multicolor filter for producing purer white across a display device
48.        4,833,644         Memory cell circuit having radiation hardness
49.        4,872,002         Integrated matrix display circuitry
50.        4,903,094         Memory cell structure having radiation hardness
51.        4,926,236         Multilayer interconnect and method of forming same
52.        4,933,904         Dense EPROM having serially coupled floating gate transistors
53.        4,947,221         Memory cell for a dense EPROM
54.        4,963,860         Integrated matrix display circuitry
55.        4,965,646         Thin film transistor and crossover structure for liquid crystal displays
56.        4,968,119         High-density liquid-crystal active dot-matrix display structure
57.        4,989,061         Radiation hard memory cell structure with drain shielding
58.        5,076,667         High speed signal and power supply bussing for liquid crystal displays
59.        5,093,581         Circuitry for generating pulses of variable widths from binary input data
60.        5,105,187         Shift register for active matrix display devices
61.        5,122,676         Variable pulse width generator including a timer vernier
62.        5,122,792         Electronic time vernier circuit
63.        5,148,058         Logic circuits as for amorphous silicon self-scanned matrix arrays
64.        5,175,446         Demultiplexer including a three-state gate
65.        5,302,966         Active matrix electroluminescent display and method of operation
66.        5,337,068         Field-sequential display system utilizing a backlit LCD pixel array and ...  forming an image
67.        5,587,329         Method for fabricating switching transistor having capacitive network proximate a drift region
68.        5,654,731         Shielded pixel structure for liquid crystal displays
69.        5,736,752         Active matrix electroluminescent display pixel element having a field shield ...
70.        5,932,892         High-voltage transistor
71.        5,952,789         AMOLED display pixel structure and data load/illuminate circuit therefore
72.        6,229,506        Active matrix light emitting diode pixel structure and concomitant method
73.        6,307,322        TFT circuitry with reduced sensitivity to variance in transistor threshold voltage
74.        6,348,906        Line Scanning Circuit for Dual-Mode Display
75.        6,370,019        Sealing of large Area Display Structures
76.        6,414,661        Method ... for calibrating display devices and automatically compensating ... over time
77.        6,417,825        Analog active matrix emissive display
78.        6,476,783        Contrast enhancement ... using a black matrix and lens array on outer surface of display
79.        6,606,247        Multi-feature-size electronic structures
80.        6,618,030        Active matrix light emitting diode pixel structure and concomitant method
81.        6,683,663        Web fabrication of devices
82.        6,816,380        Electronic devices with small functional elements supported on a carrier
83.        6,825,836        Bus arrangement for a driver of a matrix display
84.        6,863,219        Apparatuses and methods for forming electronic assemblies
85.        6,897,855        Tiled electronic display structure
86.        6,927,085        Web fabrication of devices
87.        6,933,848        System and method for disabling data on radio frequency identification tags
88.        6,942,155        Integrated circuits with persistent data storage
89.        6,952,157        System and method for concurrently addressing multiple RFID tags from a single reader
90.        6,980,184        Display devices and integrated circuits
91.        6,985,361        Electronic devices with small functional elements supported on a carrier
92.        6,988,667        Methods and apparatuses to identify devices
93.        7,172,910        Web fabrication of devices
94.        7,173,528        System & method for disabling data on RFID tags
95.        7,193,504        Methods & apparatus for identification
96.        7,221,258        Hierarchical electronic watermarks & method …
97.        7,260,882        Methods for making electronic devices w small …
98.        7,262,686        Methods & apparatus to identify devices
99.        7,333,001        Secure personal documents & method of use
100.      7,364,084        Persistent data storage
101.      7,377,445        Persistent data storage

Published Patent Applications

2004-0008123        System & method for tracking medical devices
2004-0246280        Image degradation correction in novel LCDs
2005-0078104        Tiled electronic display structure
2005-0081908        Method and apparatus for generation of electrical power from solar energy
2005-0121526        Battery activation circuit
2006-0087407        Master tags
2006-0208898        Compact omnidirectional RF system
2006-0208958        Compact omnidirectional RF system
2006-0250220        Accurate persistent nodes
2006-0250251        Semi-transparent RFID tags
2006-0255131        Smart tag activation
2006-0265181        Battery monitor
2007-0013484        Methods & apparatus for identification
2007-0018793        Ramped interrogation power levels
2007-0018828        System & method for disabling data on RFID tags
2007-0118309        Battery monitor
2007-0206701        RFID reader with digital waveform encoding …
2007-0206704        RFID reader with adaptive carrier cancellation
2007-0206705        RFID reader with adjustable filtering & adaptive backscatter processing
2007-0247884        Attribute Cache memory
2007-0256291        Methods for making electronic devices w small …
2007-0262851        Methods & apparatus to identify devices
2007-0279194        Methods & apparatus for identification
2008-0055223        Pixel circuits & method for driving pixels
2008-0062090        Pixel circuits & method for driving pixels
2008-0062091        Pixel circuits & method for driving pixels
2008-0065662        Compressed tag codes & mapping
Patents & Services