| Class Number |
Class Name |
Patents |
| 356/121 |
Lamp beam direction or pattern |
316 |
| 356/123 |
Focal position of light source |
75 |
| 356/124 |
Lens or reflective image former testing |
461 |
| 356/128 |
Refraction testing (e.g., refractometers) |
268 |
| 356/138 |
Angle measuring or angular axial alignment |
408 |
| 356/2 |
Contour plotting |
123 |
| 356/213 |
Photometers |
118 |
| 356/23 |
Motion stopping (e.g., stroboscopes) |
58 |
| 356/237.1 |
Inspection of flaws or impurities |
898 |
| 356/242.1 |
Thread counting |
3 |
| 356/243.1 |
Standard |
243 |
| 356/244 |
Sample, specimen, or standard holder or support (e.g., plates or slides) |
766 |
| 356/247 |
Fiducial instruments |
78 |
| 356/256 |
Miscellaneous |
57 |
| 356/27 |
Velocity or velocity/height measuring |
51 |
| 356/29 |
Optical element or reticle responds to relative velocity of remote object |
17 |
| 356/3 |
Range or remote distance finding |
131 |
| 356/30 |
Crystal or gem examination |
176 |
| 356/300 |
By dispersed light spectroscopy |
353 |
| 356/32 |
Material strain analysis |
205 |
| 356/335 |
For size of particles |
249 |
| 356/337 |
By particle light scattering |
257 |
| 356/344 |
By electrophoresis |
233 |
| 356/36 |
With sample preparation |
296 |
| 356/364 |
By polarized light examination |
541 |
| 356/388 |
By configuration comparison |
81 |
| 356/39 |
Blood analysis |
830 |
| 356/399 |
By alignment in lateral direction |
633 |
| 356/402 |
By shade or color |
448 |
| 356/426 |
By inspection with agitation or rotation |
102 |
| 356/429 |
By monitoring of webs or thread |
336 |
| 356/43 |
Optical pyrometers |
189 |
| 356/432 |
For light transmission or absorption |
702 |
| 356/445 |
Of light reflection (e.g., glass) |
1,014 |
| 356/450 |
By light interference (e.g., interferometer) |
382 |
| 356/51 |
Infrared and ultraviolet |
254 |
| 356/52 |
Egg candling |
15 |
| 356/600 |
Surface roughness |
268 |
| 356/601 |
Shape or surface configuration |
490 |
| 356/614 |
Position or displacement |
667 |
| 356/625 |
Dimension |
289 |
| 356/69 |
Cutting blade sharpness |
3 |
| 356/70 |
Oil testing (e.g., contamination) |
116 |
| 356/71 |
Document pattern analysis or verification |
640 |
| 356/72 |
With plural diverse test or art |
410 |
| 356/73 |
Plural test |
764 |
| 356/73.1 |
For optical fiber or waveguide inspection |
1,230 |
| 356/900 |
Interferometers (go1b 9/02) |
0 |
| 356/904 |
Measuring microscopes (go1b 9/04) |
5 |
| 356/905 |
Measuring telescopes (go1b 9/06) |
0 |
| 356/906 |
Optical projection comparators, e.g., for profile (go1b 9/08) |
0 |
| 356/907 |
Goniometers (go1b 9/10) |
0 |
| 356/908 |
Measuring length, width, or thickness (go1b 11/02) |
3 |
| 356/911 |
Measuring the deformation in a solid, e.g., optical strain gauge (go1b 11/16) |
0 |
| 356/912 |
Measuring angles (go1c 1/00) |
1 |
| 356/916 |
Altimeters for aircraft (go1c 5/00a) |
0 |
| 356/917 |
Measuring inclination, e.g., by clinometers, by levels (go1c 9/00) |
0 |
| 356/918 |
Photogrammetry; photographic surveying (go1c 11/00) |
2 |
| 356/922 |
Photometry, e.g., photographic exposure meter (go1j 11/04) |
0 |
| 356/923 |
Radiation pyrometry (golj 5/00) |
0 |
| 356/924 |
Measuring velocity of light (golj 7/00) |
0 |
| 356/925 |
Measuring optical phase difference: measuring optical wavelength (go1j 9/00) |
4 |
| 356/926 |
Measuring the characteristics of individual optical pulses or of optical pulse trains (go1j 11/00) |
1 |
| 356/927 |
Measuring variations of optical properties of material when it is stressed, e.g., by photoelastic stress analysis using infra-red, visible light, ultra-violet (go1l 1/24) |
0 |
| 356/928 |
Investigating or analyzing materials by the use of optical means, i.e., using infra-red, visible, or ultra-violet light (go1n 21/00) |
6 |
| 356/955 |
Measuring linear or angular speed utilizing devices characterized by the use of optical means, e.g., using infra-red, visible, or ultra-violet light (go1p 3/36) |
0 |
