1
Richard Vance Crommett: Firearm having a new gas operating system. Bartels Law Group, Donald L Bartels, September 11, 2012: US08261653 (23 worldwide citation)

M-16/AR-15 firearms modified with a new gas operating system are described. The modification of the firearm with the new gas operating system has a forward mounted gas and recoil spring system in which high pressure propellant gases from the cartridge expand in the barrel and operate the firearm.


2
Mohamed Sherif Danish, Kris Walter Kimbrough: Display and search interface for product database. Kelora Systems, Donald L Bartels, Bartels Law Group, February 8, 2011: US07885956 (11 worldwide citation)

A technique for displaying and searching databases provides a user interface that displays a list of attribute values of a product along with corresponding user interface elements, each containing a set of clickable sub-elements corresponding to subsets of possible attribute values with different ra ...


3
Mohamed Sherif Danish, Kris Walter Kimbrough: Display and search interface for product database. Kelora Systems, Donald L Bartels, Bartels Law Group, June 26, 2012: US08209327 (10 worldwide citation)

A computer-implemented method for enabling a user to search for and display information stored in a searchable database of product records, including providing a user interface to the database for enabling data contained in the database to be displayed on the user's computer and for enabling user in ...


4
Bradley G Mountz, Daniel Ohlendorf, Yi Min Wu: Multi-scale mechanism. Mountz, Donald L Bartels, Bartels Law Group, July 30, 2013: US08495935 (5 worldwide citation)

A multi-scale mechanism comprising a rotatable driving shaft; a first scale mounted along the axis of said rotatable driving shaft, said scale including first and second sets of coarse scale divisions for indicating a coarse range of magnitude in two different systems of units as a function of the p ...


5
Richard Vance Crommett: Firearm having a new gas operating system. Donald L Bartels, Bartels Law Group, November 19, 2013: US08584575 (5 worldwide citation)

A method of operating a firearm having a modified gas operating system including directing gas from a barrel of a firearm upward through a barrel gas port, routing the gas from the barrel gas port through a gas jet, directing the gas from the gas jet through a gas operation tube, and directing the g ...


6
Barbara E White: Convertible maternity coat. Donald L Bartels, Bartels Law Group, May 4, 2010: US07707651 (3 worldwide citation)

A two panel convertible maternity coat that can be used by a woman before, after, and during pregnancy, a pregnancy panel, and a baby panel. Pregnancy is accommodated through the addition of the pregnancy panel between the front sides of the coat. The pregnancy panel is wider at the bottom and taper ...


7
Steven Patrick Laur, Zbigniew Jan Lata, Jinyu Yang: Advanced clock synchronization circuit for switch mode power supplies. Intersil Americas, Donald L Bartels, Bartels Law Group, October 29, 2013: US08570014 (3 worldwide citation)

In a switch mode power supply, a circuit and method for switching between an internal clock and an external synchronization clock when a stable external clock has been detected, and for switching back to operating the power supply using said internal clock when a predetermined number of sequential e ...


8
Evan Grund: Test circuits and current pulse generator for simulating an electrostatic discharge. Donald L Bartels, Bartels Law Group, October 2, 2012: US08278936 (3 worldwide citation)

This invention is an electrostatic discharge testing circuit that can deliver current pulses to a component under test (CUT) with a custom amplitude versus time profile shape. Pulse generation with customized shapes is accomplished by discharging an energy storage network comprised of capacitor(s), ...


9
Alicia Gruber Kalamas: System and method for generating a medical history. MedSleuth, Donald L Bartels, Bartels Law Group, March 15, 2011: US07908154 (2 worldwide citation)

A system and method for generating a medical history that is determined based on the patient's medication list. Medications are taken for specific indications, i.e., disease and/or symptom, and the system includes a knowledge base of all known medications and associated indications. Preferably, an e ...


10
Robert Ward Carter, Robert Ding: Pipe bursting apparatus. Tric Tools, Donald L Bartels, Bartels Law Group, April 22, 2014: US08702349 (1 worldwide citation)

Apparatus for replacing underground pipe is described, including a resistance plate from which a pair of hydraulic cylinders extend perpendicularly in parallel with each other. The cylinders operate cyclically with a pulling bridge having a cable gripper to provide a sequence of pulling strokes to a ...