Patents by Inventor William Juan Calvo

William Juan Calvo 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).

  • Multi pen dry erase marker
    Patent number: 11305576
    Abstract: The multi pen dry erase marker consists of two to six color dry erase pens that are spring loaded into an ergonomic housing and designed to be used with one hand only. Changing of colors is easy to do by pushing a button to add a pen color. To remove a color the pen is pushed back into the housing which locks it back in place. The end cap of the marker has a large felt or sponge tip to easily erase using a standard whiteboard. A storage cap protects the pens from drying out when being stored.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: April 19, 2022
    Inventors: Roger Henry Gagnon, William Juan Calvo, Steve Butcher
  • Multi Pen Dry Erase Marker
    Publication number: 20210094339
    Abstract: The multi pen dry erase marker consists of two to six color dry erase pens that are spring loaded into an ergonomic housing and designed to be used with one hand only. Changing of colors is easy to do by pushing a button to add a pen color. To remove a color the pen is pushed back into the housing which locks it back in place. The end cap of the marker has a large felt or sponge tip to easily erase using a standard whiteboard. A storage cap protects the pens from drying out when being stored.
    Type: Application
    Filed: September 27, 2019
    Publication date: April 1, 2021
    Inventors: Roger Henry Gagnon, William Juan Calvo, Steve Butcher