Sight glass
United States Patent D538320
US Patent References:
/0374645.html
Watkins - December, 1887 - 0374645
Optical instrument
Goodman - March, 1943 - 2312542
Fastening device for cover plates
De Giers - September, 1948 - 2450330
Cursor
Boehm - January, 1951 - 2538502
/D183774.html
Stefanakis - October, 1958 - D183774
/0374645.html
Watkins - December, 1887 - 0374645
Optical instrument
Goodman - March, 1943 - 2312542
Fastening device for cover plates
De Giers - September, 1948 - 2450330
Cursor
Boehm - January, 1951 - 2538502
/D183774.html
Stefanakis - October, 1958 - D183774
Representative Image:
Inventors:
Sprague, Curtis (Johnson City, TN, US)
Application Number:
D/235092
Publication Date:
03/13/2007
Filing Date:
07/27/2005
View Patent Images:
Export Citation:
Assignee:
Branham Corporation (Johnson City, TN, US)
Primary Class:
Other Classes:
D16/130
International Classes:
(IPC1-7): 1606
Field of Search:
40/780, D16/132, D16/135, 49/463, 359/793, 40/790, 27/1, 235/70B, 40/782, D6/300, 40/785, 403/401, D16/130, D8/382, 40/777, 40/721, 359/894, D16/134, D21/330, D8/394, D6/311
US Patent References:
Primary Examiner:
Greene, Paula A.
Attorney, Agent or Firm:
Stainbrook, Craig M.
Stainbrook & Stainbrook, LLP
Stainbrook & Stainbrook, LLP
Claims:
CLAIM
1. The ornamental design for a sight glass, as shown and described.
1. The ornamental design for a sight glass, as shown and described.
Description:
FIG. 1 is a front perspective view of sight glass showing my new design, the bottom is a mirror image of the top;
FIG. 2 is a front elevational view thereof, the undisclosed rear is unornamented and not part of the claimed design; and,
FIG. 3 is a right side elevational view thereof, the left side is a mirror image.