Patents by Inventor John H. Carrington

John H. Carrington has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7410612
    Abstract: A gunpowder particle test kit for determining gunpowder residue includes a transparent sleeve having a closed end and an open folded end sealed with a clip forming a sealed cavity carrying a test strip and a crushable ampoule carrying a diphenylamine solution. The test strip has an adhesive area on a front surface. An opaque label is provided on a rear surface on the sleeve opposite the adhesive area. In use, the clip is removed to open the cavity, the test strip removed and applied to possible residue areas on a subject. The strip is returned to the cavity; the clip reapplied to seal the cavity. Thereafter, the ampoule is crushed to release the solution, which develops a distinctive coloration observable against the label to indicate the presence of possible gunpowder residue.
    Type: Grant
    Filed: December 4, 2003
    Date of Patent: August 12, 2008
    Inventor: John H. Carrington
  • Patent number: 7050715
    Abstract: An integrated imager and camera mounting assembly that allows a single operator to scan the crime scene for prints without assistance, and to attain an optimally illuminated and stably focused recorded image with single handed adjustments. The assembly includes an A-frame stand which carries a pair of UV lights on adjustable arms for single handled adjustment by the operator in the scanning and recording modes. The stand includes a footed base that allows the operator to securely engage the frame against vertical, horizontal and irregular surfaces using the imager handle thereby locating the imager at a fixed distance from the print area and permitting ready focusing of the image with the other hand. The base further includes a sliding scale for placement in the field of view for dimensional referencing.
    Type: Grant
    Filed: July 22, 2004
    Date of Patent: May 23, 2006
    Inventors: John H. Carrington, David W. Harvey
  • Patent number: 6725801
    Abstract: A fingerprint ink dispenser includes a one-piece clamshell pocket sized case including base and pivotal lid that overlies the base. The base holds a fingerprint inkpad and includes provisions for mechanically, frictionally and magnetically mounting the case on a variety of mounting surfaces.
    Type: Grant
    Filed: November 18, 2002
    Date of Patent: April 27, 2004
    Inventors: John H. Carrington, David W. Harvey
  • Patent number: 6725802
    Abstract: An ink dispenser includes a lower case having a cavity whereat a ceramic imprint ink dispensing plate is releasably retained by flexible tabs and including provisions for mechanically, frictionally and magnetically mounting the case on a variety of mounting surfaces.
    Type: Grant
    Filed: April 28, 2003
    Date of Patent: April 27, 2004
    Inventors: John H. Carrington, David W. Harvey
  • Patent number: 4248543
    Abstract: Finger print dispensing apparatus includes a compact manually operated portable unit. The unit includes a detachable brush for spreading the powder dispensed, a squeezable detachable container for holding the powder and a nozzle arrangement for delivering the powder to the brush when the container is squeezed. An extendible and retractable sleeve is provided to either house and shape the brush during non use or to expose the brush during use. Moisture proof means are provided on the sleeve to house the brush and keep the powder in the container dry when the apparatus is not in use.
    Type: Grant
    Filed: February 14, 1979
    Date of Patent: February 3, 1981
    Assignee: Sirchie Finger Print Laboratories, Inc.
    Inventors: John H. Carrington, Herman Rudolph