ROBERT J BROWN
Plumbers in Hingham, MA
License number
Massachusetts 34162
Issued Date
Apr 29, 2009
Expiration Date
May 1, 2012
Type
Apprentice Plumber
Address
Address
Hingham, MA 02061
Professional information
Writing Instrument With Ball Point And Two Reservoirs
US Patent:
4536099, Aug 20, 1985
Filed:
Nov 8, 1983
Appl. No.:
6/550075
Inventors:
Charles P. Kiricoples - Salem MA
Henry Behrens - Topsfield MA
Robert L. Brown - Hingham MA
Henry Behrens - Topsfield MA
Robert L. Brown - Hingham MA
Assignee:
The Gillette Company - Boston MA
International Classification:
B43K 700, B43K 708
US Classification:
401209
Abstract:
A ball-point writing instrument in which dislodging of the rotating ball as a result of accidental droppage on a hard surface is prevented by employing an ink reservoir construction designed to prevent propagation of a travelling pressure step in the column of ink above the rotating ball.