Freiburger; T. M. - US Patent Attorneys and Agents

Attorney: Freiburger; T. M.

Number of patents: 31
Last date: September 19, 1989

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Number	Title	Issue Date
4868836	Laser diode power control and modulator circuit A control system particularly for a modulated laser diode such as for use in laser printers, laser communication systems, optical data storage and other uses employs bipolar integrated circuitry on a single chip with very few external components. The circ...	09/19/1989
4852265	Level/plumb indicator with tilt compensation A tool for use in establishing a precise level line or plumb line or line for alignment uses a visible laser diode for projecting the line. The tool is relatively small and compact, drives the laser diode using batteries contained in the tool, and include...	08/01/1989
4845349	Bar code scanner laser emission reduction An optical bar code reader using a light source which can be switched on quickly and includes provision for activating the light source and related devices only when data is actually being gathered, rather than wasting a large amount of beam on time and e...	07/04/1989
4812068	Writing device with alarm An alarm-generating writing device is disclosed, the constitution of which is such that a push bottom switch is provided on the body of the writing device (pen or pencil), the push button switch being able to close the circuit in order to activate an alar...	03/14/1989
4798943	Method and system for control of a bar code scanner threshold A system for control of a bar code scanner threshold with deliberate decay includes monitoring a selected scan signal characteristic of characteristics and electronically determining whether sets of signal characteristics represent a bar code or extraneou...	01/17/1989
4799164	Shallow bar code scanner A compact counter-type bar code scanner produces a "five-apparent-source" scan geometry within an optimum scan volume above the deck of the bar code reader, with a total scanner housing height of less than 13 centimeters, and preferably about 11.5 centime...	01/17/1989
4797170	System for holding carpet in place without stretching A carpet and pad installation avoids the need for stretching and tackless strips by utilizing a pad with pressure-sensitive adhesive on one surface. The pad is first laid on the floor surface and trimmed as required, with either the adhesive surface down ...	01/10/1989
4796275	Floating mirror mount A floating mirror mount for a mirror of a laser comprises a mirror having a front surface and a back surface. A keeper encircles the mirror and has a peripheral flange which engages the front surface of the mirror when the mirror mount is not installed in...	01/03/1989
4796270	Compact rigid dye laser construction A dye laser is of compact, rigid and simple construction, with a folded resonator cavity contained on a single rigid block of material, such as aluminum. The block has two or three mirror mount locations, at least one of which is a machined surface which ...	01/03/1989
4794240	Bar code scanner construction A housing construction for a POS type bar code scanner with multiple apparent source scan geometry includes only two main housing components. Each a casting to which one or a number of routing mirrors are bonded so as to precisely locate the plane of each...	12/27/1988
4792666	Bar code reader with compensation for signal variation on different scan lines A method and apparatus for obtaining a more uniform output signal strength among various scan lines of a multiple scan line laser bar code reader involves switching of the gain level in the return signal amplifier of the bar code reader apparatus, in acco...	12/20/1988
4779284	Gas laser with coaxial gas resevoir A gas laser such as an argon or krypton laser has an annular gas reservoir surrounding a laser bore. A series of heat-dissipating fins are connected to the laser bore and extend between the exterior of the laser bore and the interior of the coaxial gas re...	10/18/1988
4775058	Display shelf organizer A display shelf dividing and labeling assembly includes a plurality of divider strips which extend back to divide the display space on a shelf, connected to a front base member overhanging the front edge of the shelf. The divider strips are slidably recei...	10/04/1988
4773103	Adjustable toilet cleaner dispenser A regulating closure for a dispenser of toilet bowl cleaner includes an annular band which snaps onto a cap portion and has generally semicircular openings which can be placed in registry with similar openings in the cap portion, or which can be adjusted ...	09/27/1988
4766299	Hand-mounted bar code reader A hand worn laser bar code reader scanner device is of compact design and adapted to be worn comfortably on the back of the hand of the user. A switch associated with the laser is attached to a hand strap such that the bar code reader is switched on and o...	08/23/1988
4750809	Pulse compression A pulse compressor compresses a relatively long width optical pulse (of the kind which may be transform limited) to a short width pulse. The compressor includes a color generator which broadens the bandwidth of the long pulse to include any additional col...	06/14/1988
4750509	Folding device of a tent-framework A tent and folding tent framework which enable quick and easy setup and taking down of the tent include a central hub member about which six ribs are pivotable. The hub member or fixed disk is made of plastic material and includes openings which enable th...	06/14/1988
4734841	Laser power supply circuit A power supply circuit for a gas laser has primary circuitry and secondary circuitry supplied by the primary circuitry. A transformer is positioned between the primary circuitry and a secondary circuitry. Within the secondary circuitry is a spark gap and ...	03/29/1988
4712853	Rapidly starting low power scan mechanism A beam scanner system particularly for use with laser scanners employs the back EMF signal from a scanner driving motor for a tachometer signal indicating motor speed. The tachometer signal goes into a phase lock loop for causing the motor at startup to q...	12/15/1987
4710942	Variable power gas laser tube A gas laser construction includes a second anode in the vicinity of the cathode, so that current can be directed through the second anode when the laser is at low current levels, thereby assuring an adequate supply of electrons around the cathode to avoid...	12/01/1987
4709195	Bar code scanner with DC brushless motor A laser scanner having a rotating mirror, such as a POS scanner as used in supermarkets, uses a closed-loop velocity controlled DC brushless motor for rotating the mirror. In addition to providing a hall effect motor speed signal which is used for monitor...	11/24/1987
4699447	Optical beam scanner with rotating mirror An optical scanner apparatus particularly suited for use in a laser bar code reader includes a series of mirrors mounted in a basket-like array about the optical beam axis. A mirror is mounted obliquely across the beam axis, directly on the path of the be...	10/13/1987
4699884	Process and apparatus for the simultaneous application of a multiplicity of liquid samples to an object stage The invention relates to a process and an apparatus for the simultaneous application of a multiplicity of liquid samples to an object stage (2), more especially of sera to an object stage overgrown with cell cultures. In this connection, according to the ...	10/13/1987
4698479	Beam delivery system for a CO₂ laser A beam delivery system for delivering a laser beam from a stationary laser to a point in space under robot control has a universal or spherical shoulder joint which is free to rotate in any direction, a wrist joint which receives the beam from the shoulde...	10/06/1987
4694182	Hand held bar code reader with modulated laser diode and detector A hand held bar code reader employs a laser diode as its laser source, for an efficient and compact construction. The diode is modulated, and an associated bar code reading detector is timed accordingly, so that (1) the effects of strong ambient light whi...	09/15/1987
4689796	Method and apparatus for regulating pressure in laser tubes A temperature responsive, gas entrapping material contained in a chamber connected to a gas laser tube selectively entraps gas to regulate the pressure in the laser tube. A temperature regulator adjusts the temperature of the gas entrapping material and t...	08/25/1987
4685111	Phase stabilization for mode locked lasers A method and system for stabilizing the phase relationship of two RF-controlled mode locked lasers involves monitoring the output of both lasers and, with a phase detector/comparator, generating a voltage proportional to the phase difference between the t...	08/04/1987
4677640	Crystalline quartz laser window assembly A window assembly for a laser uses a uniaxial crystalline material such as quartz for the window, secured directly in a hard seal to a metal tubular end component. In order to avoid significant differential thermal expansion between the quartz window and ...	06/30/1987
4672620	Fast axial flow carbon dioxide laser A fast axial flow carbon dioxide laser has a laser head arranged to provide multiple folding of the laser beam into two, four or more linear passes. The construction of the head is such as to provide for generating either one laser beam or a pair of beams...	06/09/1987
4672215	Hand held laser bar code reader with safety shutoff responsive to housing motion detector A hand held laser bar code reader includes a motion sensor and associated circuitry to disable energization of the laser unless the bar code reader has just undergone some degree of motion. This safety feature avoids the possibility of the bar code reader...	06/09/1987
4627569	Four function pneumatic controller A pneumatic controller for use in controlling airflow in a conditioned air distribution system is adjustable to accommodate different types of damper actuation and thermostats in different systems. The four-function controller can be manually reconfigured...	12/09/1986

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Attorney: Freiburger; T. M.