|Publication number||USD237016 S|
|Publication date||Sep 30, 1975|
|Filing date||Apr 18, 1974|
|Publication number||US D237016 S, US D237016S, US-S-D237016, USD237016 S, USD237016S|
|Inventors||Charles F. Stevenson|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (2)|
|External Links: USPTO, USPTO Assignment, Espacenet|
Des. 237,016 Patented Sept. 30, 1975 X-RAY COLLIMATING EXTENSION TUBE POSI- TIONING RING FOR POSTERIOR TYPE DENTAL X-RAY FILM HOLDERS Charles F. Stevenson, Elgin, Ill., assignor to Rinn Corporation, Elgin, Ill.
Filed Apr. 18, 1974, Ser. No. 461,951
Term of patent 14 years Int. Cl. D24-0I US. Cl. D83l II FIG. 1 is a perspective view of an X-ray collimating extension tube positioning ring for posterior type dental X-ray film holders showing my new design;
FIG. 2 is a plan view of the positioning ring taken from the side of same shown in FIG. 1;
FIG. 3 is a plan view of the positioning ring taken from the far side of the ring as shown in FIG. 1;
FIG. 4 is an edge plan view of the positioning ring taken substantially along line 4-4 of FIG. 1;
FIG. 5 is an edge plan view of the positioning ring taken substantially along line 5-5 of FIG. 3;
FIG. 6 is an edge plan view of the positioning ring taken substantially along line 66 of FIG. 2;
FIG. 7 is a fragmentary view in plan taken substantially along line 77 of FIG. 1; and
FIG. 8 is a fragmentary sectional view taken substantially along line 8-8 of FIG. 2.
The ornamental design for an X-ray collimating extension tube positioning ring for posterior type dental X-ray film holders, substantially as shown.
References Cited UNITED STATES PATENTS D. 2l7,996 7/1970 Spranger DSB-l H 1,947,014 2/1934 Levy 250490 3,092,721 6/1963 Medwedeff et al. 250479 3,539,805 11/1970 Shiller et a]. 25049O BERNARD ANSHER, Primary Examiner
|Citing Patent||Filing date||Publication date||Applicant||Title|
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